%%
%% bibliography related commands
%%

%% length used to display the bibliography
\newlength{\rw}
\setlength{\rw}{1.5cm}

%% read header
\IfFileExists{header.BBlog.tex}{\input{header.BBlog}}{}

%% cite a reference
\def\cite#1{%
%% check whether the reference exists
\ifcsname cite#1\endcsname%
\csname cite#1\endcsname%
\else%
{\bf??}%
\fi%
%
%% add entry to citelist after checking it has not already been added
\ifcsname if#1cited\endcsname%
\expandafter\if\csname if#1cited\endcsname%
\else%
\csname if#1citedtrue\endcsname%
\immediate\write\@auxout{\noexpand\BBlogcite{#1}}%
\fi%
\else%
\expandafter\newif\csname if#1cited\endcsname%
\csname if#1citedtrue\endcsname%
\immediate\write\@auxout{\noexpand\BBlogcite{#1}}%
\fi%
}
%% an empty definition for the aux file
\def\BBlogcite#1{}

%% display the bibliography	
\long\def\BBlography{
  \newlength{\colw}
  \setlength{\colw}{\textwidth}
  \addtolength{\colw}{-\rw}
  \IfFileExists{bibliography.BBlog.tex}{
  \input{bibliography.BBlog}}{{\tt error: missing BBlog bibliography file}}
}