[n] S. O, “Limiting Density Distribution for Charged Particle Beams in Free Space”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 404-407.
%\cite{SO:PAC91} \bibitem{SO:PAC91} S. O, \textquotedblleft{Limiting Density Distribution for Charged Particle Beams in Free Space}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 404--407.
@inproceedings{so:pac91, author = {S. O}, title = {{Limiting Density Distribution for Charged Particle Beams in Free Space}}, booktitle = {Proc. PAC'91}, pages = {404--407}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }