[n] J. Friedrich et al., “Properties of the GSI HLI-RFQ Structure”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 3044-3047.
%\cite{Friedrich:PAC91} \bibitem{Friedrich:PAC91} J. Friedrich \emph{et al.}, \textquotedblleft{Properties of the GSI HLI-RFQ Structure}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 3044--3047.
@inproceedings{friedrich:pac91, author = {J. Friedrich and others}, title = {{Properties of the GSI HLI-RFQ Structure}}, booktitle = {Proc. PAC'91}, pages = {3044--3047}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }