ARAstroBib.sty

%%
%% This is file `ARAstroBib.sty',
%% Created by Latha Swaminathan, TechBooks 
%% For Astronomy and Astrophysics of Annual Reviews
%%
%% 
\NeedsTeXFormat{LaTeX2e}[1997/12/01]
\ProvidesPackage{ARAstroBib}[2005/04/21]
%
\usepackage[sort]{natbib}  % Activates author/year citations
%
% Use comma to separate multile references.
\bibpunct{(}{)}{,}{a}{}{,}% 
%
%
% Unless one citation has three authors, in which case semicolon
% is used between references.
%
\let\save@NAT@citex\NAT@citex
%
\def\SemicolonForThree@citex[#1][#2]#3{%
   \def\NAT@sep{,}%
   {\let\protect=\@unexpandable@protect\let~\relax\let\active@prefix=\@gobble
    \process@cite#3,\@nil}%
    \save@NAT@citex[#1][#2]{#3}}
%
\let\NAT@citex\SemicolonForThree@citex
%
\def\process@cite#1,#2\@nil{%
   \@ifundefined{b@#1}{}{\protected@edef\@Ttemp{\csname b@#1\endcsname}%
                         \expandafter\NAT@split\@Ttemp
                         \expandafter\check@threeauthors\NAT@name}%
   \edef\@Tttemp{#2}\ifx\@Tttemp\@empty\else\process@cite#2\@nil\fi}
%   
\def\check@threeauthors#1{\@check@threeauthors#1,\@nil}
\def\@check@threeauthors#1,#2\@nil{%
   \edef\@Tttemp{#2}\ifx\@Tttemp\@empty\else\gdef\NAT@sep{;}\fi}
%% 
%%
%% End of file `ARAstroBib.sty'.