[n] W. Brefeld and P. Gurtler, “A Bypass for Synchrotron Radiation Experiments at the Storage Ring PETRA II”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 2793-2796.
%\cite{Brefeld:PAC91} \bibitem{Brefeld:PAC91} W. Brefeld and P. Gurtler, \textquotedblleft{A Bypass for Synchrotron Radiation Experiments at the Storage Ring PETRA II}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 2793--2796.
@inproceedings{brefeld:pac91, author = {W. Brefeld and P. Gurtler}, title = {{A Bypass for Synchrotron Radiation Experiments at the Storage Ring PETRA II}}, booktitle = {Proc. PAC'91}, pages = {2793--2796}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }