Using \cite in \sout causes errors

Question

When I use \cite[something with spaces]{ref} inside \sout{...} I get errors. For the article document class it helps to replace spaces by ~. That doesn't help, however, for the elsarticle document class. See minimal working example below:

\documentclass{elsarticle}
% \documentclass{article}
\usepackage{ulem}

\begin{document}

text
\cite{lamport}
\cite[p.10]{lamport}
\cite[p. 10]{lamport}
\cite[p.~10]{lamport}
\sout{text}
\sout{\cite{lamport}}
\sout{\cite[p.10]{lamport}}
% \sout{\cite[p. 10]{lamport}} % Fails with elsarticle and article
% \sout{\cite[p.~10]{lamport}} % Fails with elsarticle only

\begin{thebibliography}{9}

\bibitem{lamport}
  Leslie Lamport,
  \textit{\LaTeX: a document preparation system},
  Addison Wesley, Massachusetts,
  2nd edition,
  1994.

\end{thebibliography}

\end{document}

For article I get

! Argument of \UL@word has an extra }.

whereas for elsarticle I get

! Extra }, or forgotten \endgroup.
\UL@stop ...z@ \else \UL@putbox \fi \else \egroup 
                                                  \egroup \UL@putbox \fi \if...

Is this an error in ulem? I would be grateful if anyone knows a quick-fix.

Kind regards.

Answer 1

Although I tried looking for the answer before posting, I only found it afterwards. See ulem incompatibility with multiple entries in \cite. I would prefer that ulem just didn't have this problem, but a quick-fix seems to be putting \cite in an \mbox:

\sout{\mbox{\cite[p. 10]{lamport}}} % Fails with elsarticle and article
\sout{\mbox{\cite[p.~10]{lamport}}} % Fails with elsarticle only

Answer 2

Simply put curly brackets around p. 10:

\documentclass{elsarticle}
% \documentclass{article}
\usepackage{ulem}

\begin{document}


\sout{\cite[{p. 10}]{lamport}}

\begin{thebibliography}{9}

\bibitem{lamport}
  Leslie Lamport,
  \textit{\LaTeX: a document preparation system},
  Addison Wesley, Massachusetts,
  2nd edition,
  1994.

\end{thebibliography}

\end{document}