%%
%% This is file `backref.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% backref.dtx  (with options: `package')
%% 
\def\fileversion{1.16}
\def\filedate{1999/04/12}
%% File: backref.dtx Copyright (C) 1995, 1996, 1997, 1999 David Carlisle, Sebastian Rahtz
%% This package may be distributed under the terms of the LaTeX Project Public
%% License, as described in lppl.txt in the base LaTeX distribution.
%% Either version 1.0 or, at your option, any later version.
\ProvidesPackage{backref}[\filedate:
  bibliographical back referencing, \fileversion]

\long\def\page@backref#1#2#3{#1}
\long\def\section@backref#1#2#3{#2}
\long\def\hyper@section@backref#1#2#3{\hyperlink{#3}{#2}}
\long\def\hyper@page@backref#1#2#3{\hyperlink{page.#1}{#1}}
\DeclareOption{pageref}{%
  \def\backref{pages }%
  \let\backrefxxx\page@backref
}
\DeclareOption{ref}{%
  \def\backref{sections }%
  \let\backrefxxx\section@backref
}
\DeclareOption{hyperref}{%
  \def\backref{}\let\backrefxxx\hyper@section@backref
}
\DeclareOption{hyperpageref}{%
  \def\backref{}\let\backrefxxx\hyper@page@backref
}
\ExecuteOptions{pageref}
\ProcessOptions
\@ifundefined{newblock}{\def\newblock{\par}}{}
\def\xbibitem{\@ifnextchar[{\@xlbibitem}{\@xbibitem}}
\def\@xlbibitem[#1]#2#3\par{%
 \oldb[#1]{#2}#3
 \newblock
 \backref{\csname br@#2\endcsname}%
 \par
}%
\def\@xbibitem#1#2\par{%
 \oldb{#1}#2
 \newblock
 \backref{\csname br@#1\endcsname}%
 \par
}
\def\backcite#1#2{%
  \@for\x:=#1\do{%
   \edef\x{\expandafter\@firstofone\x\@empty}%
   \expandafter\protected@xdef\csname br@\x\endcsname{%
   \expandafter\ifx\csname br@\x\endcsname\relax\else
     \csname br@\x\endcsname, \fi\protect\backrefxxx#2}}}
\def\@currentHref{}
\AtBeginDocument{%
  \let\oldb\bibitem
  \let\bibitem\xbibitem
  \let\oldbibl\thebibliography
  \def\thebibliography{\@starttoc{brf}{}\oldbibl}
  \@ifundefined{NAT@parse}{%
   \global\let\old@citex\@citex
   \global\let\@citex\x@citex
   }{\typeout{** backref set up for natbib ***}}
}
\def\x@citex[#1]#2{%
  \old@citex[#1]{#2}%
  \hy@backout{#2}%
}
\def\hy@backout#1{%
  \@bsphack
  \ifx\@empty\@currentlabel
    \protected@write\@auxout{}%
    {\string\@writefile{brf}%
      {\string\backcite{#1}{{\thepage}{(document)}{Doc-Start}}}}%
  \else
   \protected@write\@auxout{}%
   {\string\@writefile{brf}%
     {\string\backcite{#1}{{\thepage}{\@currentlabel}{\@currentHref}}}}%
  \fi
   \@esphack
}
\endinput
%%
%% End of file `backref.sty'.