%%% This is onecw.sty, version of 29 june 1990, by Nico Verwer.
%%% Normally, LaTeX issues a warning every time it encounters an
%%% undefined citation. Thus you will get multiple warnings for the same
%%% citation. When you include this sty file, only one warning will be
%%% issued for every citation.
%%% Almost all of this code is directly taken from latex.tex.
%%% Please email suggestions (I'm still looking for a better name),
%%% comments, etc. to verwer@cs.ruu.nl .
\def\@citex[#1]#2{\if@filesw\immediate\write\@auxout{\string\citation{#2}}\fi
  \def\@citea{}\@cite{\@for\@citeb:=#2\do
    {\@citea\def\@citea{,\penalty\@m\ }\@ifundefined
       {b@\@citeb}{{\bf ?}\@warning
       {Citation `\@citeb' on page \thepage \space undefined}
       \global\@namedef{b@\@citeb}{{\bf ?}}}%
\hbox{\csname b@\@citeb\endcsname}}}{#1}}
