我正在写一篇文章，其中我使用了分节参考书目（我没有使用 bibtex）。代码如下：
\documentclass{article}
\begin{document}
% Save old cite/bibitem command(s)
\let\oldcite\cite
\let\oldtextcite\textcite % Add others as needed
\let\oldbibitem\bibitem
% Add new counter to increment at each paper
\newcounter{papernum}
\def\nextpaper{\stepcounter{papernum}}
% Define new cite/bibitem command(s) with prefix applied
\def\mynewcite#1{\oldcite{\thepapernum#1}}%
\def\mynewtextcite#1{\oldtextcite{\thepapernum#1}}%
\def\mynewbibitem#1{\oldbibitem{\thepapernum#1}}%
% Reroute original commands to new commands
\let\cite\mynewcite%
\let\textcite\mynewtextcite%
\let\bibitem\mynewbibitem%
\section*{Paper 1}\nextpaper %This could be wrapped into whatever unit you use to start a new paper; just make sure another sectioning command (in this case, References is also a \section*) doesn't increment the counter in places you don't want it to.
Ipsum \cite{ipsum}, % I want this to produce the text '[1]', since it is number 1 in this paper's bibliography.
Dolor \cite{dolor}
\begin{thebibliography}{9}
\bibitem{ipsum} Ipsum
\bibitem{dolor} Dolor
\end{thebibliography}
\section*{Paper 2}\nextpaper
Lorem \cite{lorem}, Ipsum \cite{ipsum}
\begin{thebibliography}{9}
\bibitem{lorem} Lorem
\bibitem{ipsum} Ipsum
\end{thebibliography}
\end{document}
效果很好，但是当我写第 (论文 2) 节时，它显示 [1,?]。在这种情况下，\cite{lorem,ipsum}如何使用命令获取多个引用？\cite
答案1
我不确定你为什么要使用方形轮子，但是，既然你这么做了，也许这样的东西会适合：
\documentclass{article}
% Add new counter to increment at each paper
\newcounter{papernum}
\def\nextpaper{\stepcounter{papernum}}
% Save old bibitem command(s)
\let\oldbibitem\bibitem
\def\mynewbibitem#1{\oldbibitem{\thepapernum#1}}
\let\bibitem\mynewbibitem
\makeatletter
\def\@citex[#1]#2{\leavevmode
\let\@citea\@empty
\@cite{\@for\@citeb:=#2\do
{\@citea\def\@citea{,\penalty\@m\ }%
\edef\@citeb{\thepapernum\expandafter\@firstofone\@citeb\@empty}%
\if@filesw\immediate\write\@auxout{\string\citation{\@citeb}}\fi
\@ifundefined{b@\@citeb}{\hbox{\reset@font\bfseries ?}%
\G@refundefinedtrue
\@latex@warning
{Citation `\@citeb' on page \thepage \space undefined}}%
{\@cite@ofmt{\csname b@\@citeb\endcsname}}}}{#1}}
\makeatother
\begin{document}
\section*{Paper 1}\nextpaper %This could be wrapped into whatever unit you use to start a new paper; just make sure another sectioning command (in this case, References is also a \section*) doesn't increment the counter in places you don't want it to.
Ipsum \cite{ipsum}, % I want this to produce the text '[1]', since it is number 1 in this paper's bibliography.
Dolor \cite{dolor}
\begin{thebibliography}{9}
\bibitem{ipsum} Ipsum
\bibitem{dolor} Dolor
\end{thebibliography}
\section*{Paper 2}\nextpaper
Lorem \cite{lorem}, Ipsum \cite{ipsum}
Lorem and Ipsum \cite{lorem,ipsum}
\begin{thebibliography}{9}
\bibitem{lorem} Lorem
\bibitem{ipsum} Ipsum
\end{thebibliography}
\end{document}
以下是代码中定义的方形轮子的结果：
