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+%%
+%% This is file `natbib.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% natbib.dtx  (with options: `package,all')
+%% =============================================
+%% IMPORTANT NOTICE:
+%% 
+%% This program can be redistributed and/or modified under the terms
+%% of the LaTeX Project Public License Distributed from CTAN
+%% archives in directory macros/latex/base/lppl.txt; either
+%% version 1 of the License, or any later version.
+%% 
+%% This is a generated file.
+%% It may not be distributed without the original source file natbib.dtx.
+%% 
+%% Full documentation can be obtained by LaTeXing that original file.
+%% Only a few abbreviated comments remain here to describe the usage.
+%% =============================================
+%% Copyright 1993-2009 Patrick W Daly
+%% Max-Planck-Institut f\"ur Sonnensystemforschung
+%% Max-Planck-Str. 2
+%% D-37191 Katlenburg-Lindau
+%% Germany
+%% E-mail: daly@mps.mpg.de
+\NeedsTeXFormat{LaTeX2e}[1995/06/01]
+\ProvidesPackage{natbib}
+        [2009/07/16 8.31 (PWD, AO)]
+
+ % This package reimplements the LaTeX \cite command to be used for various
+ % citation styles, both author-year and numerical. It accepts BibTeX
+ % output intended for many other packages, and therefore acts as a
+ % general, all-purpose citation-style interface.
+ %
+ % With standard numerical .bst files, only numerical citations are
+ % possible. With an author-year .bst file, both numerical and
+ % author-year citations are possible.
+ %
+ % If author-year citations are selected, \bibitem must have one of the
+ %   following forms:
+ %   \bibitem[Jones et al.(1990)]{key}...
+ %   \bibitem[Jones et al.(1990)Jones, Baker, and Williams]{key}...
+ %   \bibitem[Jones et al., 1990]{key}...
+ %   \bibitem[\protect\citeauthoryear{Jones, Baker, and Williams}{Jones
+ %       et al.}{1990}]{key}...
+ %   \bibitem[\protect\citeauthoryear{Jones et al.}{1990}]{key}...
+ %   \bibitem[\protect\astroncite{Jones et al.}{1990}]{key}...
+ %   \bibitem[\protect\citename{Jones et al., }1990]{key}...
+ %   \harvarditem[Jones et al.]{Jones, Baker, and Williams}{1990}{key}...
+ %
+ % This is either to be made up manually, or to be generated by an
+ % appropriate .bst file with BibTeX.
+ %                            Author-year mode     ||   Numerical mode
+ % Then, \citet{key}  ==>>  Jones et al. (1990)    ||   Jones et al. [21]
+ %       \citep{key}  ==>> (Jones et al., 1990)    ||   [21]
+ % Multiple citations as normal:
+ % \citep{key1,key2}  ==>> (Jones et al., 1990; Smith, 1989) || [21,24]
+ %                           or  (Jones et al., 1990, 1991)  || [21,24]
+ %                           or  (Jones et al., 1990a,b)     || [21,24]
+ % \cite{key} is the equivalent of \citet{key} in author-year mode
+ %                         and  of \citep{key} in numerical mode
+ % Full author lists may be forced with \citet* or \citep*, e.g.
+ %       \citep*{key}      ==>> (Jones, Baker, and Williams, 1990)
+ % Optional notes as:
+ %   \citep[chap. 2]{key}    ==>> (Jones et al., 1990, chap. 2)
+ %   \citep[e.g.,][]{key}    ==>> (e.g., Jones et al., 1990)
+ %   \citep[see][pg. 34]{key}==>> (see Jones et al., 1990, pg. 34)
+ %  (Note: in standard LaTeX, only one note is allowed, after the ref.
+ %   Here, one note is like the standard, two make pre- and post-notes.)
+ %   \citealt{key}          ==>> Jones et al. 1990
+ %   \citealt*{key}         ==>> Jones, Baker, and Williams 1990
+ %   \citealp{key}          ==>> Jones et al., 1990
+ %   \citealp*{key}         ==>> Jones, Baker, and Williams, 1990
+ % Additional citation possibilities (both author-year and numerical modes)
+ %   \citeauthor{key}       ==>> Jones et al.
+ %   \citeauthor*{key}      ==>> Jones, Baker, and Williams
+ %   \citeyear{key}         ==>> 1990
+ %   \citeyearpar{key}      ==>> (1990)
+ %   \citetext{priv. comm.} ==>> (priv. comm.)
+ %   \citenum{key}          ==>> 11 [non-superscripted]
+ % Note: full author lists depends on whether the bib style supports them;
+ %       if not, the abbreviated list is printed even when full requested.
+ %
+ % For names like della Robbia at the start of a sentence, use
+ %   \Citet{dRob98}         ==>> Della Robbia (1998)
+ %   \Citep{dRob98}         ==>> (Della Robbia, 1998)
+ %   \Citeauthor{dRob98}    ==>> Della Robbia
+ %
+ %
+ % Citation aliasing is achieved with
+ %   \defcitealias{key}{text}
+ %   \citetalias{key}  ==>> text
+ %   \citepalias{key}  ==>> (text)
+ %
+ % Defining the citation mode and punctual (citation style)
+ %   \setcitestyle{<comma-separated list of keywords, same
+ %     as the package options>}
+ % Example: \setcitestyle{square,semicolon}
+ % Alternatively:
+ % Use \bibpunct with 6 mandatory arguments:
+ %    1. opening bracket for citation
+ %    2. closing bracket
+ %    3. citation separator (for multiple citations in one \cite)
+ %    4. the letter n for numerical styles, s for superscripts
+ %        else anything for author-year
+ %    5. punctuation between authors and date
+ %    6. punctuation between years (or numbers) when common authors missing
+ % One optional argument is the character coming before post-notes. It
+ %   appears in square braces before all other arguments. May be left off.
+ % Example (and default) \bibpunct[, ]{(}{)}{;}{a}{,}{,}
+ %
+ % To make this automatic for a given bib style, named newbib, say, make
+ % a local configuration file, natbib.cfg, with the definition
+ %   \newcommand{\bibstyle@newbib}{\bibpunct...}
+ % Then the \bibliographystyle{newbib} will cause \bibstyle@newbib to
+ % be called on THE NEXT LATEX RUN (via the aux file).
+ %
+ % Such preprogrammed definitions may be invoked anywhere in the text
+ %  by calling \citestyle{newbib}. This is only useful if the style specified
+ %  differs from that in \bibliographystyle.
+ %
+ % With \citeindextrue and \citeindexfalse, one can control whether the
+ % \cite commands make an automatic entry of the citation in the .idx
+ % indexing file. For this, \makeindex must also be given in the preamble.
+ %
+ % Package Options: (for selecting punctuation)
+ %   round  -  round parentheses are used (default)
+ %   square -  square brackets are used   [option]
+ %   curly  -  curly braces are used      {option}
+ %   angle  -  angle brackets are used    <option>
+ %   semicolon  -  multiple citations separated by semi-colon (default)
+ %   colon  - same as semicolon, an earlier confusion
+ %   comma  -  separated by comma
+ %   authoryear - selects author-year citations (default)
+ %   numbers-  selects numerical citations
+ %   super  -  numerical citations as superscripts
+ %   sort   -  sorts multiple citations according to order in ref. list
+ %   sort&compress   -  like sort, but also compresses numerical citations
+ %   compress - compresses without sorting
+ %   longnamesfirst  -  makes first citation full author list
+ %   sectionbib - puts bibliography in a \section* instead of \chapter*
+ %   merge - allows the citation key to have a * prefix,
+ %           signifying to merge its reference with that of the previous citation.
+ %   elide - if references are merged, repeated portions of later ones may be removed.
+ %   mcite - recognizes and ignores the * prefix for merging.
+ % Punctuation so selected dominates over any predefined ones.
+ % Package options are called as, e.g.
+ %        \usepackage[square,comma]{natbib}
+ % LaTeX the source file natbib.dtx to obtain more details
+ % or the file natnotes.tex for a brief reference sheet.
+ %-----------------------------------------------------------
+\providecommand\@ifxundefined[1]{%
+ \ifx#1\@undefined\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
+}%
+\providecommand\@ifnum[1]{%
+ \ifnum#1\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
+}%
+\providecommand\@ifx[1]{%
+ \ifx#1\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
+}%
+\providecommand\appdef[2]{%
+ \toks@\expandafter{#1}\@temptokena{#2}%
+ \edef#1{\the\toks@\the\@temptokena}%
+}%
+\@ifclassloaded{agu2001}{\PackageError{natbib}
+  {The agu2001 class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+\@ifclassloaded{agutex}{\PackageError{natbib}
+  {The AGUTeX class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+\@ifclassloaded{aguplus}{\PackageError{natbib}
+  {The aguplus class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+\@ifclassloaded{nlinproc}{\PackageError{natbib}
+  {The nlinproc class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+\@ifclassloaded{egs}{\PackageError{natbib}
+  {The egs class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+\@ifclassloaded{egu}{\PackageError{natbib}
+  {The egu class already includes natbib coding,\MessageBreak
+   so you should not add it explicitly}
+  {Type <Return> for now, but then later remove\MessageBreak
+   the command \protect\usepackage{natbib} from the document}
+  \endinput}{}
+ % Define citation punctuation for some author-year styles
+ % One may add and delete at this point
+ % Or put additions into local configuration file natbib.cfg
+\newcommand\bibstyle@chicago{\bibpunct{(}{)}{;}{a}{,}{,}}
+\newcommand\bibstyle@named{\bibpunct{[}{]}{;}{a}{,}{,}}
+\newcommand\bibstyle@agu{\bibpunct{[}{]}{;}{a}{,}{,~}}%Amer. Geophys. Union
+\newcommand\bibstyle@copernicus{\bibpunct{(}{)}{;}{a}{,}{,}}%Copernicus Publications
+\let\bibstyle@egu=\bibstyle@copernicus
+\let\bibstyle@egs=\bibstyle@copernicus
+\newcommand\bibstyle@agsm{\bibpunct{(}{)}{,}{a}{}{,}\gdef\harvardand{\&}}
+\newcommand\bibstyle@kluwer{\bibpunct{(}{)}{,}{a}{}{,}\gdef\harvardand{\&}}
+\newcommand\bibstyle@dcu{\bibpunct{(}{)}{;}{a}{;}{,}\gdef\harvardand{and}}
+\newcommand\bibstyle@aa{\bibpunct{(}{)}{;}{a}{}{,}} %Astronomy & Astrophysics
+\newcommand\bibstyle@pass{\bibpunct{(}{)}{;}{a}{,}{,}}%Planet. & Space Sci
+\newcommand\bibstyle@anngeo{\bibpunct{(}{)}{;}{a}{,}{,}}%Annales Geophysicae
+\newcommand\bibstyle@nlinproc{\bibpunct{(}{)}{;}{a}{,}{,}}%Nonlin.Proc.Geophys.
+ % Define citation punctuation for some numerical styles
+\newcommand\bibstyle@cospar{\bibpunct{/}{/}{,}{n}{}{}%
+     \gdef\bibnumfmt##1{##1.}}
+\newcommand\bibstyle@esa{\bibpunct{(Ref.~}{)}{,}{n}{}{}%
+     \gdef\bibnumfmt##1{##1.\hspace{1em}}}
+\newcommand\bibstyle@nature{\bibpunct{}{}{,}{s}{}{\textsuperscript{,}}%
+     \gdef\bibnumfmt##1{##1.}}
+ % The standard LaTeX styles
+\newcommand\bibstyle@plain{\bibpunct{[}{]}{,}{n}{}{,}}
+\let\bibstyle@alpha=\bibstyle@plain
+\let\bibstyle@abbrv=\bibstyle@plain
+\let\bibstyle@unsrt=\bibstyle@plain
+ % The author-year modifications of the standard styles
+\newcommand\bibstyle@plainnat{\bibpunct{[}{]}{,}{a}{,}{,}}
+\let\bibstyle@abbrvnat=\bibstyle@plainnat
+\let\bibstyle@unsrtnat=\bibstyle@plainnat
+\newif\ifNAT@numbers \NAT@numbersfalse
+\newif\ifNAT@super \NAT@superfalse
+\let\NAT@merge\z@
+\DeclareOption{numbers}{\NAT@numberstrue
+   \ExecuteOptions{square,comma,nobibstyle}}
+\DeclareOption{super}{\NAT@supertrue\NAT@numberstrue
+   \renewcommand\NAT@open{}\renewcommand\NAT@close{}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{authoryear}{\NAT@numbersfalse
+   \ExecuteOptions{round,semicolon,bibstyle}}
+\DeclareOption{round}{%
+      \renewcommand\NAT@open{(} \renewcommand\NAT@close{)}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{square}{%
+      \renewcommand\NAT@open{[} \renewcommand\NAT@close{]}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{angle}{%
+      \renewcommand\NAT@open{$<$} \renewcommand\NAT@close{$>$}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{curly}{%
+      \renewcommand\NAT@open{\{} \renewcommand\NAT@close{\}}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{comma}{\renewcommand\NAT@sep{,}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{semicolon}{\renewcommand\NAT@sep{;}
+   \ExecuteOptions{nobibstyle}}
+\DeclareOption{colon}{\ExecuteOptions{semicolon}}
+\DeclareOption{nobibstyle}{\let\bibstyle=\@gobble}
+\DeclareOption{bibstyle}{\let\bibstyle=\@citestyle}
+\newif\ifNAT@openbib \NAT@openbibfalse
+\DeclareOption{openbib}{\NAT@openbibtrue}
+\DeclareOption{sectionbib}{\def\NAT@sectionbib{on}}
+\def\NAT@sort{\z@}
+\def\NAT@cmprs{\z@}
+\DeclareOption{sort}{\def\NAT@sort{\@ne}}
+\DeclareOption{compress}{\def\NAT@cmprs{\@ne}}
+\DeclareOption{sort&compress}{\def\NAT@sort{\@ne}\def\NAT@cmprs{\@ne}}
+\DeclareOption{mcite}{\let\NAT@merge\@ne}
+\DeclareOption{merge}{\@ifnum{\NAT@merge<\tw@}{\let\NAT@merge\tw@}{}}
+\DeclareOption{elide}{\@ifnum{\NAT@merge<\thr@@}{\let\NAT@merge\thr@@}{}}
+\@ifpackageloaded{cite}{\PackageWarningNoLine{natbib}
+  {The `cite' package should not be used\MessageBreak
+   with natbib. Use option `sort' instead}\ExecuteOptions{sort}}{}
+\@ifpackageloaded{mcite}{\PackageWarningNoLine{natbib}
+  {The `mcite' package should not be used\MessageBreak
+   with natbib. Use option `merge' instead}\ExecuteOptions{merge}}{}
+\@ifpackageloaded{citeref}{\PackageError{natbib}
+  {The `citeref' package must be loaded after natbib}%
+  {Move \protect\usepackage{citeref} to after \string\usepackage{natbib}}}{}
+\newif\ifNAT@longnames\NAT@longnamesfalse
+\DeclareOption{longnamesfirst}{\NAT@longnamestrue}
+\DeclareOption{nonamebreak}{\def\NAT@nmfmt#1{\mbox{\NAT@up#1}}}
+\def\NAT@nmfmt#1{{\NAT@up#1}}
+\renewcommand\bibstyle[1]{\csname bibstyle@#1\endcsname}
+\AtBeginDocument{\global\let\bibstyle=\@gobble}
+\let\@citestyle\bibstyle
+\newcommand\citestyle[1]{\@citestyle{#1}\let\bibstyle\@gobble}
+\newcommand\bibpunct[7][, ]%
+  {\gdef\NAT@open{#2}\gdef\NAT@close{#3}\gdef
+   \NAT@sep{#4}\global\NAT@numbersfalse
+     \ifx #5n\global\NAT@numberstrue\global\NAT@superfalse
+   \else
+     \ifx #5s\global\NAT@numberstrue\global\NAT@supertrue
+   \fi\fi
+   \gdef\NAT@aysep{#6}\gdef\NAT@yrsep{#7}%
+   \gdef\NAT@cmt{#1}%
+   \NAT@@setcites
+  }
+\newcommand\setcitestyle[1]{
+ \@for\@tempa:=#1\do
+ {\def\@tempb{round}\ifx\@tempa\@tempb
+    \renewcommand\NAT@open{(}\renewcommand\NAT@close{)}\fi
+  \def\@tempb{square}\ifx\@tempa\@tempb
+    \renewcommand\NAT@open{[}\renewcommand\NAT@close{]}\fi
+  \def\@tempb{angle}\ifx\@tempa\@tempb
+    \renewcommand\NAT@open{$<$}\renewcommand\NAT@close{$>$}\fi
+  \def\@tempb{curly}\ifx\@tempa\@tempb
+    \renewcommand\NAT@open{\{}\renewcommand\NAT@close{\}}\fi
+  \def\@tempb{semicolon}\ifx\@tempa\@tempb
+    \renewcommand\NAT@sep{;}\fi
+  \def\@tempb{colon}\ifx\@tempa\@tempb
+    \renewcommand\NAT@sep{;}\fi
+  \def\@tempb{comma}\ifx\@tempa\@tempb
+    \renewcommand\NAT@sep{,}\fi
+  \def\@tempb{authoryear}\ifx\@tempa\@tempb
+    \NAT@numbersfalse\fi
+  \def\@tempb{numbers}\ifx\@tempa\@tempb
+    \NAT@numberstrue\NAT@superfalse\fi
+  \def\@tempb{super}\ifx\@tempa\@tempb
+    \NAT@numberstrue\NAT@supertrue\fi
+  \expandafter\NAT@find@eq\@tempa=\relax\@nil
+  \if\@tempc\relax\else
+    \expandafter\NAT@rem@eq\@tempc
+    \def\@tempb{open}\ifx\@tempa\@tempb
+     \xdef\NAT@open{\@tempc}\fi
+    \def\@tempb{close}\ifx\@tempa\@tempb
+     \xdef\NAT@close{\@tempc}\fi
+    \def\@tempb{aysep}\ifx\@tempa\@tempb
+     \xdef\NAT@aysep{\@tempc}\fi
+    \def\@tempb{yysep}\ifx\@tempa\@tempb
+     \xdef\NAT@yrsep{\@tempc}\fi
+    \def\@tempb{notesep}\ifx\@tempa\@tempb
+     \xdef\NAT@cmt{\@tempc}\fi
+    \def\@tempb{citesep}\ifx\@tempa\@tempb
+     \xdef\NAT@sep{\@tempc}\fi
+  \fi
+ }%
+ \NAT@@setcites
+}
+ \def\NAT@find@eq#1=#2\@nil{\def\@tempa{#1}\def\@tempc{#2}}
+ \def\NAT@rem@eq#1={\def\@tempc{#1}}
+ \def\NAT@@setcites{\global\let\bibstyle\@gobble}
+\AtBeginDocument{\let\NAT@@setcites\NAT@set@cites}
+\newcommand\NAT@open{(} \newcommand\NAT@close{)}
+\newcommand\NAT@sep{;}
+\ProcessOptions
+\newcommand\NAT@aysep{,} \newcommand\NAT@yrsep{,}
+\newcommand\NAT@cmt{, }
+\newcommand\NAT@cite%
+    [3]{\ifNAT@swa\NAT@@open\if*#2*\else#2\NAT@spacechar\fi
+        #1\if*#3*\else\NAT@cmt#3\fi\NAT@@close\else#1\fi\endgroup}
+\newcommand\NAT@citenum%
+    [3]{\ifNAT@swa\NAT@@open\if*#2*\else#2\NAT@spacechar\fi
+        #1\if*#3*\else\NAT@cmt#3\fi\NAT@@close\else#1\fi\endgroup}
+\newcommand\NAT@citesuper[3]{\ifNAT@swa
+\if*#2*\else#2\NAT@spacechar\fi
+\unskip\kern\p@\textsuperscript{\NAT@@open#1\NAT@@close}%
+   \if*#3*\else\NAT@spacechar#3\fi\else #1\fi\endgroup}
+\providecommand\textsuperscript[1]{\mbox{$^{\mbox{\scriptsize#1}}$}}
+\begingroup \catcode`\_=8
+\gdef\NAT@ifcat@num#1{%
+ \ifcat_\ifnum\z@<0#1_\else A\fi
+  \expandafter\@firstoftwo
+ \else
+  \expandafter\@secondoftwo
+ \fi
+}%
+\endgroup
+\providecommand\@firstofone[1]{#1}
+\newcommand\NAT@citexnum{}
+\def\NAT@citexnum[#1][#2]#3{%
+  \NAT@reset@parser
+  \NAT@sort@cites{#3}%
+  \NAT@reset@citea
+  \@cite{\def\NAT@num{-1}\let\NAT@last@yr\relax\let\NAT@nm\@empty
+    \@for\@citeb:=\NAT@cite@list\do
+    {\@safe@activestrue
+     \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+     \@safe@activesfalse
+     \@ifundefined{b@\@citeb\@extra@b@citeb}{%
+       {\reset@font\bfseries?}
+        \NAT@citeundefined\PackageWarning{natbib}%
+       {Citation `\@citeb' on page \thepage \space undefined}}%
+     {\let\NAT@last@num\NAT@num\let\NAT@last@nm\NAT@nm
+      \NAT@parse{\@citeb}%
+      \ifNAT@longnames\@ifundefined{bv@\@citeb\@extra@b@citeb}{%
+        \let\NAT@name=\NAT@all@names
+        \global\@namedef{bv@\@citeb\@extra@b@citeb}{}}{}%
+      \fi
+      \ifNAT@full\let\NAT@nm\NAT@all@names\else
+        \let\NAT@nm\NAT@name\fi
+      \ifNAT@swa
+       \@ifnum{\NAT@ctype>\@ne}{%
+        \@citea
+        \NAT@hyper@{\@ifnum{\NAT@ctype=\tw@}{\NAT@test{\NAT@ctype}}{\NAT@alias}}%
+       }{%
+        \@ifnum{\NAT@cmprs>\z@}{%
+         \NAT@ifcat@num\NAT@num
+          {\let\NAT@nm=\NAT@num}%
+          {\def\NAT@nm{-2}}%
+         \NAT@ifcat@num\NAT@last@num
+          {\@tempcnta=\NAT@last@num\relax}%
+          {\@tempcnta\m@ne}%
+         \@ifnum{\NAT@nm=\@tempcnta}{%
+          \@ifnum{\NAT@merge>\@ne}{}{\NAT@last@yr@mbox}%
+         }{%
+           \advance\@tempcnta by\@ne
+           \@ifnum{\NAT@nm=\@tempcnta}{%
+             \ifx\NAT@last@yr\relax
+               \def@NAT@last@yr{\@citea}%
+             \else
+               \def@NAT@last@yr{--\NAT@penalty}%
+             \fi
+           }{%
+             \NAT@last@yr@mbox
+           }%
+         }%
+        }{%
+         \@tempswatrue
+         \@ifnum{\NAT@merge>\@ne}{\@ifnum{\NAT@last@num=\NAT@num\relax}{\@tempswafalse}{}}{}%
+         \if@tempswa\NAT@citea@mbox\fi
+        }%
+       }%
+       \NAT@def@citea
+      \else
+        \ifcase\NAT@ctype
+          \ifx\NAT@last@nm\NAT@nm \NAT@yrsep\NAT@penalty\NAT@space\else
+            \@citea \NAT@test{\@ne}\NAT@spacechar\NAT@mbox{\NAT@super@kern\NAT@@open}%
+          \fi
+          \if*#1*\else#1\NAT@spacechar\fi
+          \NAT@mbox{\NAT@hyper@{{\citenumfont{\NAT@num}}}}%
+          \NAT@def@citea@box
+        \or
+          \NAT@hyper@citea@space{\NAT@test{\NAT@ctype}}%
+        \or
+          \NAT@hyper@citea@space{\NAT@test{\NAT@ctype}}%
+        \or
+          \NAT@hyper@citea@space\NAT@alias
+        \fi
+      \fi
+     }%
+    }%
+      \@ifnum{\NAT@cmprs>\z@}{\NAT@last@yr}{}%
+      \ifNAT@swa\else
+        \@ifnum{\NAT@ctype=\z@}{%
+          \if*#2*\else\NAT@cmt#2\fi
+        }{}%
+        \NAT@mbox{\NAT@@close}%
+      \fi
+  }{#1}{#2}%
+}%
+\def\NAT@citea@mbox{%
+ \@citea\mbox{\NAT@hyper@{{\citenumfont{\NAT@num}}}}%
+}%
+\def\NAT@hyper@#1{%
+ \hyper@natlinkstart{\@citeb\@extra@b@citeb}#1\hyper@natlinkend
+}%
+\def\NAT@hyper@citea#1{%
+ \@citea
+ \NAT@hyper@{#1}%
+ \NAT@def@citea
+}%
+\def\NAT@hyper@citea@space#1{%
+ \@citea
+ \NAT@hyper@{#1}%
+ \NAT@def@citea@space
+}%
+\def\def@NAT@last@yr#1{%
+ \protected@edef\NAT@last@yr{%
+  #1%
+  \noexpand\mbox{%
+   \noexpand\hyper@natlinkstart{\@citeb\@extra@b@citeb}%
+   {\noexpand\citenumfont{\NAT@num}}%
+   \noexpand\hyper@natlinkend
+  }%
+ }%
+}%
+\def\NAT@last@yr@mbox{%
+ \NAT@last@yr\let\NAT@last@yr\relax
+ \NAT@citea@mbox
+}%
+\newcommand\NAT@test[1]{%
+ \@ifnum{#1=\@ne}{%
+  \ifx\NAT@nm\NAT@noname
+   \begingroup\reset@font\bfseries(author?)\endgroup
+   \PackageWarning{natbib}{%
+    Author undefined for citation`\@citeb' \MessageBreak on page \thepage%
+   }%
+  \else \NAT@nm
+  \fi
+ }{%
+  \if\relax\NAT@date\relax
+   \begingroup\reset@font\bfseries(year?)\endgroup
+   \PackageWarning{natbib}{%
+    Year undefined for citation`\@citeb' \MessageBreak on page \thepage%
+   }%
+  \else \NAT@date
+  \fi
+ }%
+}%
+\let\citenumfont=\@empty
+\newcommand\NAT@citex{}
+\def\NAT@citex%
+  [#1][#2]#3{%
+  \NAT@reset@parser
+  \NAT@sort@cites{#3}%
+  \NAT@reset@citea
+  \@cite{\let\NAT@nm\@empty\let\NAT@year\@empty
+    \@for\@citeb:=\NAT@cite@list\do
+    {\@safe@activestrue
+     \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+     \@safe@activesfalse
+     \@ifundefined{b@\@citeb\@extra@b@citeb}{\@citea%
+       {\reset@font\bfseries ?}\NAT@citeundefined
+                 \PackageWarning{natbib}%
+       {Citation `\@citeb' on page \thepage \space undefined}\def\NAT@date{}}%
+     {\let\NAT@last@nm=\NAT@nm\let\NAT@last@yr=\NAT@year
+      \NAT@parse{\@citeb}%
+      \ifNAT@longnames\@ifundefined{bv@\@citeb\@extra@b@citeb}{%
+        \let\NAT@name=\NAT@all@names
+        \global\@namedef{bv@\@citeb\@extra@b@citeb}{}}{}%
+      \fi
+     \ifNAT@full\let\NAT@nm\NAT@all@names\else
+       \let\NAT@nm\NAT@name\fi
+     \ifNAT@swa\ifcase\NAT@ctype
+       \if\relax\NAT@date\relax
+         \@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}\NAT@date}%
+       \else
+         \ifx\NAT@last@nm\NAT@nm\NAT@yrsep
+            \ifx\NAT@last@yr\NAT@year
+              \def\NAT@temp{{?}}%
+              \ifx\NAT@temp\NAT@exlab\PackageWarningNoLine{natbib}%
+               {Multiple citation on page \thepage: same authors and
+               year\MessageBreak without distinguishing extra
+               letter,\MessageBreak appears as question mark}\fi
+              \NAT@hyper@{\NAT@exlab}%
+            \else\unskip\NAT@spacechar
+              \NAT@hyper@{\NAT@date}%
+            \fi
+         \else
+           \@citea\NAT@hyper@{%
+             \NAT@nmfmt{\NAT@nm}%
+             \hyper@natlinkbreak{%
+               \NAT@aysep\NAT@spacechar}{\@citeb\@extra@b@citeb
+             }%
+             \NAT@date
+           }%
+         \fi
+       \fi
+     \or\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
+     \or\@citea\NAT@hyper@{\NAT@date}%
+     \or\@citea\NAT@hyper@{\NAT@alias}%
+     \fi \NAT@def@citea
+     \else
+       \ifcase\NAT@ctype
+        \if\relax\NAT@date\relax
+          \@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
+        \else
+         \ifx\NAT@last@nm\NAT@nm\NAT@yrsep
+            \ifx\NAT@last@yr\NAT@year
+              \def\NAT@temp{{?}}%
+              \ifx\NAT@temp\NAT@exlab\PackageWarningNoLine{natbib}%
+               {Multiple citation on page \thepage: same authors and
+               year\MessageBreak without distinguishing extra
+               letter,\MessageBreak appears as question mark}\fi
+              \NAT@hyper@{\NAT@exlab}%
+            \else
+              \unskip\NAT@spacechar
+              \NAT@hyper@{\NAT@date}%
+            \fi
+         \else
+           \@citea\NAT@hyper@{%
+             \NAT@nmfmt{\NAT@nm}%
+             \hyper@natlinkbreak{\NAT@spacechar\NAT@@open\if*#1*\else#1\NAT@spacechar\fi}%
+               {\@citeb\@extra@b@citeb}%
+             \NAT@date
+           }%
+         \fi
+        \fi
+       \or\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
+       \or\@citea\NAT@hyper@{\NAT@date}%
+       \or\@citea\NAT@hyper@{\NAT@alias}%
+       \fi
+       \if\relax\NAT@date\relax
+         \NAT@def@citea
+       \else
+         \NAT@def@citea@close
+       \fi
+     \fi
+     }}\ifNAT@swa\else\if*#2*\else\NAT@cmt#2\fi
+     \if\relax\NAT@date\relax\else\NAT@@close\fi\fi}{#1}{#2}}
+\def\NAT@spacechar{\ }%
+\def\NAT@separator{\NAT@sep\NAT@penalty}%
+\def\NAT@reset@citea{\c@NAT@ctr\@ne\let\@citea\@empty}%
+\def\NAT@def@citea{\def\@citea{\NAT@separator\NAT@space}}%
+\def\NAT@def@citea@space{\def\@citea{\NAT@separator\NAT@spacechar}}%
+\def\NAT@def@citea@close{\def\@citea{\NAT@@close\NAT@separator\NAT@space}}%
+\def\NAT@def@citea@box{\def\@citea{\NAT@mbox{\NAT@@close}\NAT@separator\NAT@spacechar}}%
+\newif\ifNAT@par \NAT@partrue
+\newcommand\NAT@@open{\ifNAT@par\NAT@open\fi}
+\newcommand\NAT@@close{\ifNAT@par\NAT@close\fi}
+\newcommand\NAT@alias{\@ifundefined{al@\@citeb\@extra@b@citeb}{%
+  {\reset@font\bfseries(alias?)}\PackageWarning{natbib}
+  {Alias undefined for citation `\@citeb'
+  \MessageBreak on page \thepage}}{\@nameuse{al@\@citeb\@extra@b@citeb}}}
+\let\NAT@up\relax
+\newcommand\NAT@Up[1]{{\let\protect\@unexpandable@protect\let~\relax
+  \expandafter\NAT@deftemp#1}\expandafter\NAT@UP\NAT@temp}
+\newcommand\NAT@deftemp[1]{\xdef\NAT@temp{#1}}
+\newcommand\NAT@UP[1]{\let\@tempa\NAT@UP\ifcat a#1\MakeUppercase{#1}%
+  \let\@tempa\relax\else#1\fi\@tempa}
+\newcommand\shortcites[1]{%
+  \@bsphack\@for\@citeb:=#1\do
+  {\@safe@activestrue
+   \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+   \@safe@activesfalse
+   \global\@namedef{bv@\@citeb\@extra@b@citeb}{}}\@esphack}
+\newcommand\NAT@biblabel[1]{\hfill}
+\newcommand\NAT@biblabelnum[1]{\bibnumfmt{#1}}
+\let\bibnumfmt\@empty
+\providecommand\@biblabel[1]{[#1]}
+\AtBeginDocument{\ifx\bibnumfmt\@empty\let\bibnumfmt\@biblabel\fi}
+\newcommand\NAT@bibsetnum[1]{\settowidth\labelwidth{\@biblabel{#1}}%
+   \setlength{\leftmargin}{\labelwidth}\addtolength{\leftmargin}{\labelsep}%
+   \setlength{\itemsep}{\bibsep}\setlength{\parsep}{\z@}%
+   \ifNAT@openbib
+     \addtolength{\leftmargin}{\bibindent}%
+     \setlength{\itemindent}{-\bibindent}%
+     \setlength{\listparindent}{\itemindent}%
+     \setlength{\parsep}{0pt}%
+   \fi
+}
+\newlength{\bibhang}
+\setlength{\bibhang}{1em}
+\newlength{\bibsep}
+ {\@listi \global\bibsep\itemsep \global\advance\bibsep by\parsep}
+
+\newcommand\NAT@bibsetup%
+   [1]{\setlength{\leftmargin}{\bibhang}\setlength{\itemindent}{-\leftmargin}%
+       \setlength{\itemsep}{\bibsep}\setlength{\parsep}{\z@}}
+\newcommand\NAT@set@cites{%
+  \ifNAT@numbers
+    \ifNAT@super \let\@cite\NAT@citesuper
+       \def\NAT@mbox##1{\unskip\nobreak\textsuperscript{##1}}%
+       \let\citeyearpar=\citeyear
+       \let\NAT@space\relax
+       \def\NAT@super@kern{\kern\p@}%
+    \else
+       \let\NAT@mbox=\mbox
+       \let\@cite\NAT@citenum
+       \let\NAT@space\NAT@spacechar
+       \let\NAT@super@kern\relax
+    \fi
+    \let\@citex\NAT@citexnum
+    \let\@biblabel\NAT@biblabelnum
+    \let\@bibsetup\NAT@bibsetnum
+    \renewcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@num\NAT@close}%
+    \def\natexlab##1{}%
+    \def\NAT@penalty{\penalty\@m}%
+  \else
+    \let\@cite\NAT@cite
+    \let\@citex\NAT@citex
+    \let\@biblabel\NAT@biblabel
+    \let\@bibsetup\NAT@bibsetup
+    \let\NAT@space\NAT@spacechar
+    \let\NAT@penalty\@empty
+    \renewcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@date\NAT@close}%
+    \def\natexlab##1{##1}%
+  \fi}
+\AtBeginDocument{\NAT@set@cites}
+\AtBeginDocument{\ifx\SK@def\@undefined\else
+\ifx\SK@cite\@empty\else
+  \SK@def\@citex[#1][#2]#3{\SK@\SK@@ref{#3}\SK@@citex[#1][#2]{#3}}\fi
+\ifx\SK@citeauthor\@undefined\def\HAR@checkdef{}\else
+  \let\citeauthor\SK@citeauthor
+  \let\citefullauthor\SK@citefullauthor
+  \let\citeyear\SK@citeyear\fi
+\fi}
+\newif\ifNAT@full\NAT@fullfalse
+\newif\ifNAT@swa
+\DeclareRobustCommand\citet
+   {\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@partrue
+     \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\newcommand\NAT@citetp{\@ifnextchar[{\NAT@@citetp}{\NAT@@citetp[]}}
+\newcommand\NAT@@citetp{}
+\def\NAT@@citetp[#1]{\@ifnextchar[{\@citex[#1]}{\@citex[][#1]}}
+\DeclareRobustCommand\citep
+   {\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@partrue
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\cite
+    {\begingroup\let\NAT@ctype\z@\NAT@partrue\NAT@swatrue
+      \@ifstar{\NAT@fulltrue\NAT@cites}{\NAT@fullfalse\NAT@cites}}
+\newcommand\NAT@cites{\@ifnextchar [{\NAT@@citetp}{%
+     \ifNAT@numbers\else
+     \NAT@swafalse
+     \fi
+    \NAT@@citetp[]}}
+\DeclareRobustCommand\citealt
+   {\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@parfalse
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\citealp
+   {\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\citenum
+   {\begingroup
+     \NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse\let\textsuperscript\NAT@spacechar
+     \NAT@citexnum[][]}
+\DeclareRobustCommand\citeauthor
+   {\begingroup\NAT@swafalse\let\NAT@ctype\@ne\NAT@parfalse
+    \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\Citet
+   {\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@partrue
+     \let\NAT@up\NAT@Up
+     \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\Citep
+   {\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@partrue
+     \let\NAT@up\NAT@Up
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\Citealt
+   {\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@parfalse
+     \let\NAT@up\NAT@Up
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\Citealp
+   {\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse
+     \let\NAT@up\NAT@Up
+         \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\Citeauthor
+   {\begingroup\NAT@swafalse\let\NAT@ctype\@ne\NAT@parfalse
+     \let\NAT@up\NAT@Up
+    \@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
+\DeclareRobustCommand\citeyear
+   {\begingroup\NAT@swafalse\let\NAT@ctype\tw@\NAT@parfalse\NAT@citetp}
+\DeclareRobustCommand\citeyearpar
+   {\begingroup\NAT@swatrue\let\NAT@ctype\tw@\NAT@partrue\NAT@citetp}
+\newcommand\citetext[1]{\NAT@open#1\NAT@close}
+\DeclareRobustCommand\citefullauthor
+   {\citeauthor*}
+\newcommand\defcitealias[2]{%
+   \@ifundefined{al@#1\@extra@b@citeb}{}
+   {\PackageWarning{natbib}{Overwriting existing alias for citation #1}}
+   \@namedef{al@#1\@extra@b@citeb}{#2}}
+\DeclareRobustCommand\citetalias{\begingroup
+   \NAT@swafalse\let\NAT@ctype\thr@@\NAT@parfalse\NAT@citetp}
+\DeclareRobustCommand\citepalias{\begingroup
+   \NAT@swatrue\let\NAT@ctype\thr@@\NAT@partrue\NAT@citetp}
+\renewcommand\nocite[1]{\@bsphack
+  \@for\@citeb:=#1\do{%
+    \@safe@activestrue
+    \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+    \@safe@activesfalse
+    \if@filesw\immediate\write\@auxout{\string\citation{\@citeb}}\fi
+    \if*\@citeb\else
+    \@ifundefined{b@\@citeb\@extra@b@citeb}{%
+       \NAT@citeundefined \PackageWarning{natbib}%
+       {Citation `\@citeb' undefined}}{}\fi}%
+  \@esphack}
+\newcommand\NAT@parse[1]{%
+  \begingroup
+   \let\protect=\@unexpandable@protect
+   \let~\relax
+   \let\active@prefix=\@gobble
+   \edef\NAT@temp{\csname b@#1\@extra@b@citeb\endcsname}%
+   \aftergroup\NAT@split
+   \expandafter
+  \endgroup
+  \NAT@temp{}{}{}{}{}@@%
+  \expandafter\NAT@parse@date\NAT@date??????@@%
+  \ifciteindex\NAT@index\fi
+}%
+\def\NAT@split#1#2#3#4#5@@{%
+  \gdef\NAT@num{#1}\gdef\NAT@name{#3}\gdef\NAT@date{#2}%
+  \gdef\NAT@all@names{#4}%
+  \ifx\NAT@num\@empty\gdef\NAT@num{0}\fi
+  \ifx\NAT@noname\NAT@all@names \gdef\NAT@all@names{#3}\fi
+}%
+\def\NAT@reset@parser{%
+  \global\let\NAT@num\@empty
+  \global\let\NAT@name\@empty
+  \global\let\NAT@date\@empty
+  \global\let\NAT@all@names\@empty
+}%
+\newcommand\NAT@parse@date{}
+\def\NAT@parse@date#1#2#3#4#5#6@@{%
+  \ifnum\the\catcode`#1=11\def\NAT@year{}\def\NAT@exlab{#1}\else
+  \ifnum\the\catcode`#2=11\def\NAT@year{#1}\def\NAT@exlab{#2}\else
+  \ifnum\the\catcode`#3=11\def\NAT@year{#1#2}\def\NAT@exlab{#3}\else
+  \ifnum\the\catcode`#4=11\def\NAT@year{#1#2#3}\def\NAT@exlab{#4}\else
+    \def\NAT@year{#1#2#3#4}\def\NAT@exlab{{#5}}\fi\fi\fi\fi}
+\newcommand\NAT@index{}
+\let\NAT@makeindex=\makeindex
+\renewcommand\makeindex{\NAT@makeindex
+  \renewcommand\NAT@index{\@bsphack\begingroup
+     \def~{\string~}\@wrindex{\NAT@idxtxt}}}
+\newcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@date\NAT@close}
+\@ifxundefined\@indexfile{}{\let\NAT@makeindex\relax\makeindex}
+\newif\ifciteindex \citeindexfalse
+\newcommand\citeindextype{default}
+\newcommand\NAT@index@alt{{\let\protect=\noexpand\let~\relax
+  \xdef\NAT@temp{\NAT@idxtxt}}\expandafter\NAT@exp\NAT@temp\@nil}
+\newcommand\NAT@exp{}
+\def\NAT@exp#1\@nil{\index[\citeindextype]{#1}}
+
+\AtBeginDocument{%
+\@ifpackageloaded{index}{\let\NAT@index=\NAT@index@alt}{}}
+\newcommand\NAT@ifcmd{\futurelet\NAT@temp\NAT@ifxcmd}
+\newcommand\NAT@ifxcmd{\ifx\NAT@temp\relax\else\expandafter\NAT@bare\fi}
+\def\NAT@bare#1(#2)#3(@)#4\@nil#5{%
+  \if @#2
+    \expandafter\NAT@apalk#1, , \@nil{#5}%
+  \else
+  \NAT@wrout{\the\c@NAT@ctr}{#2}{#1}{#3}{#5}%
+\fi
+}
+\newcommand\NAT@wrout[5]{%
+\if@filesw
+      {\let\protect\noexpand\let~\relax
+       \immediate
+       \write\@auxout{\string\bibcite{#5}{{#1}{#2}{{#3}}{{#4}}}}}\fi
+\ignorespaces}
+\def\NAT@noname{{}}
+\renewcommand\bibitem{\@ifnextchar[{\@lbibitem}{\@lbibitem[]}}%
+\let\NAT@bibitem@first@sw\@secondoftwo
+\def\@lbibitem[#1]#2{%
+  \if\relax\@extra@b@citeb\relax\else
+    \@ifundefined{br@#2\@extra@b@citeb}{}{%
+     \@namedef{br@#2}{\@nameuse{br@#2\@extra@b@citeb}}%
+    }%
+  \fi
+  \@ifundefined{b@#2\@extra@b@citeb}{%
+   \def\NAT@num{}%
+  }{%
+   \NAT@parse{#2}%
+  }%
+  \def\NAT@tmp{#1}%
+  \expandafter\let\expandafter\bibitemOpen\csname NAT@b@open@#2\endcsname
+  \expandafter\let\expandafter\bibitemShut\csname NAT@b@shut@#2\endcsname
+  \@ifnum{\NAT@merge>\@ne}{%
+   \NAT@bibitem@first@sw{%
+    \@firstoftwo
+   }{%
+    \@ifundefined{NAT@b*@#2}{%
+     \@firstoftwo
+    }{%
+     \expandafter\def\expandafter\NAT@num\expandafter{\the\c@NAT@ctr}%
+     \@secondoftwo
+    }%
+   }%
+  }{%
+   \@firstoftwo
+  }%
+  {%
+   \global\advance\c@NAT@ctr\@ne
+   \@ifx{\NAT@tmp\@empty}{\@firstoftwo}{%
+    \@secondoftwo
+   }%
+   {%
+    \expandafter\def\expandafter\NAT@num\expandafter{\the\c@NAT@ctr}%
+    \global\NAT@stdbsttrue
+   }{}%
+   \bibitem@fin
+   \item[\hfil\NAT@anchor{#2}{\NAT@num}]%
+   \global\let\NAT@bibitem@first@sw\@secondoftwo
+   \NAT@bibitem@init
+  }%
+  {%
+   \NAT@anchor{#2}{}%
+   \NAT@bibitem@cont
+   \bibitem@fin
+  }%
+  \@ifx{\NAT@tmp\@empty}{%
+    \NAT@wrout{\the\c@NAT@ctr}{}{}{}{#2}%
+  }{%
+    \expandafter\NAT@ifcmd\NAT@tmp(@)(@)\@nil{#2}%
+  }%
+}%
+\def\bibitem@fin{%
+ \@ifxundefined\@bibstop{}{\csname bibitem@\@bibstop\endcsname}%
+}%
+\def\NAT@bibitem@init{%
+ \let\@bibstop\@undefined
+}%
+\def\NAT@bibitem@cont{%
+ \let\bibitem@Stop\bibitemStop
+ \let\bibitem@NoStop\bibitemContinue
+}%
+\def\BibitemOpen{%
+ \bibitemOpen
+}%
+\def\BibitemShut#1{%
+ \bibitemShut
+ \def\@bibstop{#1}%
+ \let\bibitem@Stop\bibitemStop
+ \let\bibitem@NoStop\bibitemNoStop
+}%
+\def\bibitemStop{}%
+\def\bibitemNoStop{.\spacefactor\@mmm\space}%
+\def\bibitemContinue{\spacefactor\@mmm\space}%
+\mathchardef\@mmm=3000 %
+\providecommand{\bibAnnote}[3]{%
+  \BibitemShut{#1}%
+  \def\@tempa{#3}\@ifx{\@tempa\@empty}{}{%
+   \begin{quotation}\noindent
+    \textsc{Key:}\ #2\\\textsc{Annotation:}\ \@tempa
+   \end{quotation}%
+  }%
+}%
+\providecommand{\bibAnnoteFile}[2]{%
+  \IfFileExists{#2}{%
+    \bibAnnote{#1}{#2}{\input{#2}}%
+  }{%
+    \bibAnnote{#1}{#2}{}%
+  }%
+}%
+\let\bibitemOpen\relax
+\let\bibitemShut\relax
+\def\bibfield{\@ifnum{\NAT@merge>\tw@}{\@bibfield}{\@secondoftwo}}%
+\def\@bibfield#1#2{%
+ \begingroup
+  \let\Doi\@gobble
+  \let\bibinfo\relax
+  \let\restore@protect\@empty
+  \protected@edef\@tempa{#2}%
+  \aftergroup\def\aftergroup\@tempa
+ \expandafter\endgroup\expandafter{\@tempa}%
+ \expandafter\@ifx\expandafter{\csname @bib#1\endcsname\@tempa}{%
+  \expandafter\let\expandafter\@tempa\csname @bib@X#1\endcsname
+ }{%
+  \expandafter\let\csname @bib#1\endcsname\@tempa
+  \expandafter\let\expandafter\@tempa\csname @bib@Y#1\endcsname
+ }%
+ \@ifx{\@tempa\relax}{\let\@tempa\@firstofone}{}%
+ \@tempa{#2}%
+}%
+\def\bibinfo#1{%
+ \expandafter\let\expandafter\@tempa\csname bibinfo@X@#1\endcsname
+ \@ifx{\@tempa\relax}{\@firstofone}{\@tempa}%
+}%
+\def\@bib@Xauthor#1{\let\@bib@Xjournal\@gobble}%
+\def\@bib@Xjournal#1{\begingroup\let\bibinfo@X@journal\@bib@Z@journal#1\endgroup}%
+\def\@bibibid@#1{\textit{ibid}.}%
+\appdef\NAT@bibitem@init{%
+ \let\@bibauthor  \@empty
+ \let\@bibjournal \@empty
+ \let\@bib@Z@journal\@bibibid@
+}%
+\ifx\SK@lbibitem\@undefined\else
+   \let\SK@lbibitem\@lbibitem
+   \def\@lbibitem[#1]#2{%
+     \SK@lbibitem[#1]{#2}\SK@\SK@@label{#2}\ignorespaces}\fi
+\newif\ifNAT@stdbst \NAT@stdbstfalse
+
+\AtEndDocument{%
+  \ifNAT@stdbst\if@filesw
+   \immediate\write\@auxout{%
+    \string\providecommand\string\NAT@force@numbers{}%
+    \string\NAT@force@numbers
+   }%
+  \fi\fi
+ }
+\newcommand\NAT@force@numbers{%
+  \ifNAT@numbers\else
+  \PackageError{natbib}{Bibliography not compatible with author-year
+  citations.\MessageBreak
+  Press <return> to continue in numerical citation style}
+  {Check the bibliography entries for non-compliant syntax,\MessageBreak
+   or select author-year BibTeX style, e.g. plainnat}%
+  \global\NAT@numberstrue\fi}
+
+\providecommand\bibcite{}
+\renewcommand\bibcite[2]{%
+ \@ifundefined{b@#1\@extra@binfo}{\relax}{%
+   \NAT@citemultiple
+   \PackageWarningNoLine{natbib}{Citation `#1' multiply defined}%
+ }%
+ \global\@namedef{b@#1\@extra@binfo}{#2}%
+}%
+\AtEndDocument{\NAT@swatrue\let\bibcite\NAT@testdef}
+\newcommand\NAT@testdef[2]{%
+  \def\NAT@temp{#2}%
+  \expandafter \ifx \csname b@#1\@extra@binfo\endcsname\NAT@temp
+  \else
+    \ifNAT@swa \NAT@swafalse
+      \PackageWarningNoLine{natbib}{%
+        Citation(s) may have changed.\MessageBreak
+        Rerun to get citations correct%
+      }%
+    \fi
+  \fi
+}%
+\newcommand\NAT@apalk{}
+\def\NAT@apalk#1, #2, #3\@nil#4{%
+  \if\relax#2\relax
+    \global\NAT@stdbsttrue
+    \NAT@wrout{#1}{}{}{}{#4}%
+  \else
+    \NAT@wrout{\the\c@NAT@ctr}{#2}{#1}{}{#4}%
+  \fi
+}%
+\newcommand\citeauthoryear{}
+\def\citeauthoryear#1#2#3(@)(@)\@nil#4{%
+  \if\relax#3\relax
+    \NAT@wrout{\the\c@NAT@ctr}{#2}{#1}{}{#4}%
+  \else
+    \NAT@wrout{\the\c@NAT@ctr}{#3}{#2}{#1}{#4}%
+  \fi
+}%
+\newcommand\citestarts{\NAT@open}%
+\newcommand\citeends{\NAT@close}%
+\newcommand\betweenauthors{and}%
+\newcommand\astroncite{}
+\def\astroncite#1#2(@)(@)\@nil#3{%
+ \NAT@wrout{\the\c@NAT@ctr}{#2}{#1}{}{#3}%
+}%
+\newcommand\citename{}
+\def\citename#1#2(@)(@)\@nil#3{\expandafter\NAT@apalk#1#2, \@nil{#3}}
+\newcommand\harvarditem[4][]{%
+ \if\relax#1\relax
+   \bibitem[#2(#3)]{#4}%
+ \else
+   \bibitem[#1(#3)#2]{#4}%
+ \fi
+}%
+\newcommand\harvardleft{\NAT@open}
+\newcommand\harvardright{\NAT@close}
+\newcommand\harvardyearleft{\NAT@open}
+\newcommand\harvardyearright{\NAT@close}
+\AtBeginDocument{\providecommand{\harvardand}{and}}
+\newcommand\harvardurl[1]{\textbf{URL:} \textit{#1}}
+\providecommand\bibsection{}
+\@ifundefined{chapter}{%
+  \renewcommand\bibsection{%
+   \section*{\refname\@mkboth{\MakeUppercase{\refname}}{\MakeUppercase{\refname}}}%
+  }%
+}{%
+  \@ifxundefined\NAT@sectionbib{%
+    \renewcommand\bibsection{%
+      \chapter*{\bibname\@mkboth{\MakeUppercase{\bibname}}{\MakeUppercase{\bibname}}}%
+    }%
+  }{%
+    \renewcommand\bibsection{%
+      \section*{\bibname\ifx\@mkboth\@gobbletwo\else\markright{\MakeUppercase{\bibname}}\fi}%
+    }%
+  }%
+}%
+\@ifclassloaded{amsart}{\renewcommand\bibsection{\section*{\refname}}}{}%
+\@ifclassloaded{amsbook}{\renewcommand\bibsection{\chapter*{\bibname}}}{}%
+\@ifxundefined\bib@heading{}{\let\bibsection\bib@heading}%
+\newcounter{NAT@ctr}
+\renewenvironment{thebibliography}[1]{%
+ \bibsection
+ \parindent\z@
+ \bibpreamble
+ \bibfont
+ \list{\@biblabel{\the\c@NAT@ctr}}{\@bibsetup{#1}\global\c@NAT@ctr\z@}%
+ \ifNAT@openbib
+   \renewcommand\newblock{\par}%
+ \else
+   \renewcommand\newblock{\hskip .11em \@plus.33em \@minus.07em}%
+ \fi
+ \sloppy\clubpenalty4000\widowpenalty4000
+ \sfcode`\.\@m
+ \let\NAT@bibitem@first@sw\@firstoftwo
+    \let\citeN\cite \let\shortcite\cite
+    \let\citeasnoun\cite
+}{%
+ \bibitem@fin
+ \bibpostamble
+ \def\@noitemerr{%
+  \PackageWarning{natbib}{Empty `thebibliography' environment}%
+ }%
+ \endlist
+ \bibcleanup
+}%
+\let\bibfont\@empty
+\let\bibpreamble\@empty
+\let\bibpostamble\@empty
+\def\bibcleanup{\vskip-\lastskip}%
+\providecommand\reset@font{\relax}
+\providecommand\bibname{Bibliography}
+\providecommand\refname{References}
+\newcommand\NAT@citeundefined{\gdef \NAT@undefined {%
+    \PackageWarningNoLine{natbib}{There were undefined citations}}}
+\let \NAT@undefined \relax
+\newcommand\NAT@citemultiple{\gdef \NAT@multiple {%
+    \PackageWarningNoLine{natbib}{There were multiply defined citations}}}
+\let \NAT@multiple \relax
+\AtEndDocument{\NAT@undefined\NAT@multiple}
+\providecommand\@mkboth[2]{}
+\providecommand\MakeUppercase{\uppercase}
+\providecommand{\@extra@b@citeb}{}
+\gdef\@extra@binfo{}
+\def\NAT@anchor#1#2{%
+ \hyper@natanchorstart{#1\@extra@b@citeb}%
+  \def\@tempa{#2}\@ifx{\@tempa\@empty}{}{\@biblabel{#2}}%
+ \hyper@natanchorend
+}%
+\providecommand\hyper@natanchorstart[1]{}%
+\providecommand\hyper@natanchorend{}%
+\providecommand\hyper@natlinkstart[1]{}%
+\providecommand\hyper@natlinkend{}%
+\providecommand\hyper@natlinkbreak[2]{#1}%
+\AtBeginDocument{%
+  \@ifpackageloaded{babel}{%
+     \let\org@@citex\@citex}{}}
+\providecommand\@safe@activestrue{}%
+\providecommand\@safe@activesfalse{}%
+
+\newcommand\NAT@sort@cites[1]{%
+  \let\NAT@cite@list\@empty
+  \@for\@citeb:=#1\do{\expandafter\NAT@star@cite\@citeb\@@}%
+  \if@filesw
+    \expandafter\immediate\expandafter\write\expandafter\@auxout
+      \expandafter{\expandafter\string\expandafter\citation\expandafter{\NAT@cite@list}}%
+  \fi
+  \@ifnum{\NAT@sort>\z@}{%
+    \expandafter\NAT@sort@cites@\expandafter{\NAT@cite@list}%
+  }{}%
+}%
+\def\NAT@star@cite{%
+  \let\NAT@star@sw\@secondoftwo
+  \@ifnum{\NAT@merge>\z@}{%
+   \@ifnextchar*{%
+    \let\NAT@star@sw\@firstoftwo
+    \NAT@star@cite@star
+   }{%
+    \NAT@star@cite@nostar
+   }%
+  }{%
+   \NAT@star@cite@noextension
+  }%
+}%
+\def\NAT@star@cite@star*{%
+ \NAT@star@cite@nostar
+}%
+\def\NAT@star@cite@nostar{%
+ \let\nat@keyopt@open\@empty
+ \let\nat@keyopt@shut\@empty
+ \@ifnextchar[{\NAT@star@cite@pre}{\NAT@star@cite@pre[]}%
+}%
+\def\NAT@star@cite@pre[#1]{%
+ \def\nat@keyopt@open{#1}%
+ \@ifnextchar[{\NAT@star@cite@post}{\NAT@star@cite@post[]}%
+}%
+\def\NAT@star@cite@post[#1]#2\@@{%
+ \def\nat@keyopt@shut{#1}%
+ \NAT@star@sw{\expandafter\global\expandafter\let\csname NAT@b*@#2\endcsname\@empty}{}%
+ \NAT@cite@list@append{#2}%
+}%
+\def\NAT@star@cite@noextension#1\@@{%
+  \let\nat@keyopt@open\@empty
+  \let\nat@keyopt@shut\@empty
+  \NAT@cite@list@append{#1}%
+}%
+\def\NAT@cite@list@append#1{%
+  \edef\@citeb{\@firstofone#1\@empty}%
+  \if@filesw\@ifxundefined\@cprwrite{}{\expandafter\@cprwrite\@citeb=}\fi
+  \if\relax\nat@keyopt@open\relax\else
+   \global\expandafter\let\csname NAT@b@open@\@citeb\endcsname\nat@keyopt@open
+  \fi
+  \if\relax\nat@keyopt@shut\relax\else
+   \global\expandafter\let\csname NAT@b@shut@\@citeb\endcsname\nat@keyopt@shut
+  \fi
+  \toks@\expandafter{\NAT@cite@list}%
+  \ifx\NAT@cite@list\@empty
+    \@temptokena\expandafter{\@citeb}%
+  \else
+    \@temptokena\expandafter{\expandafter,\@citeb}%
+  \fi
+  \edef\NAT@cite@list{\the\toks@\the\@temptokena}%
+}%
+\newcommand\NAT@sort@cites@[1]{%
+  \count@\z@
+  \@tempcntb\m@ne
+  \let\@celt\delimiter
+  \def\NAT@num@list{}%
+  \let\NAT@cite@list\@empty
+  \let\NAT@nonsort@list\@empty
+  \@for \@citeb:=#1\do{\NAT@make@cite@list}%
+  \ifx\NAT@nonsort@list\@empty\else
+   \protected@edef\NAT@cite@list{\NAT@cite@list\NAT@nonsort@list}%
+  \fi
+  \ifx\NAT@cite@list\@empty\else
+   \protected@edef\NAT@cite@list{\expandafter\NAT@xcom\NAT@cite@list @@}%
+  \fi
+}%
+\def\NAT@make@cite@list{%
+  \advance\count@\@ne
+  \@safe@activestrue
+  \edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
+  \@safe@activesfalse
+  \@ifundefined{b@\@citeb\@extra@b@citeb}%
+   {\def\NAT@num{A}}%
+   {\NAT@parse{\@citeb}}%
+  \NAT@ifcat@num\NAT@num
+   {\@tempcnta\NAT@num \relax
+    \@ifnum{\@tempcnta<\@tempcntb}{%
+      \let\NAT@@cite@list=\NAT@cite@list
+      \let\NAT@cite@list\@empty
+      \begingroup\let\@celt=\NAT@celt\NAT@num@list\endgroup
+      \protected@edef\NAT@num@list{%
+       \expandafter\NAT@num@celt \NAT@num@list \@gobble @%
+      }%
+    }{%
+      \protected@edef\NAT@num@list{\NAT@num@list \@celt{\NAT@num}}%
+      \protected@edef\NAT@cite@list{\NAT@cite@list\@citeb,}%
+      \@tempcntb\@tempcnta
+    }%
+   }%
+   {\protected@edef\NAT@nonsort@list{\NAT@nonsort@list\@citeb,}}%
+}%
+\def\NAT@celt#1{%
+  \@ifnum{#1>\@tempcnta}{%
+    \xdef\NAT@cite@list{\NAT@cite@list\@citeb,\NAT@@cite@list}%
+    \let\@celt\@gobble
+  }{%
+    \expandafter\def@NAT@cite@lists\NAT@@cite@list\@@
+  }%
+}%
+\def\NAT@num@celt#1#2{%
+ \ifx#1\@celt
+  \@ifnum{#2>\@tempcnta}{%
+    \@celt{\number\@tempcnta}%
+    \@celt{#2}%
+  }{%
+    \@celt{#2}%
+    \expandafter\NAT@num@celt
+  }%
+ \fi
+}%
+\def\def@NAT@cite@lists#1,#2\@@{%
+  \xdef\NAT@cite@list{\NAT@cite@list#1,}%
+  \xdef\NAT@@cite@list{#2}%
+}%
+\def\NAT@nextc#1,#2@@{#1,}
+\def\NAT@restc#1,#2{#2}
+\def\NAT@xcom#1,@@{#1}
+\InputIfFileExists{natbib.cfg}
+       {\typeout{Local config file natbib.cfg used}}{}
+%% 
+%% <<<<< End of generated file <<<<<<
+%%
+%% End of file `natbib.sty'.