[n] A. Piwinski, “Observation of Beam-Beam Effects in PETRA”, in Proc. PAC'79, San Francisco, CA, USA, Mar. 1979, pp. 4268-4271.
%\cite{Piwinski:PAC79} \bibitem{Piwinski:PAC79} A. Piwinski, \textquotedblleft{Observation of Beam-Beam Effects in PETRA}\textquotedblright, in \emph{Proc. PAC’79}, San Francisco, CA, USA, Mar. 1979, pp. 4268--4271.
@inproceedings{piwinski:pac79, author = {A. Piwinski}, title = {{Observation of Beam-Beam Effects in PETRA}}, booktitle = {Proc. PAC'79}, pages = {4268--4271}, paper = {}, venue = {San Francisco, CA, USA, Mar. 1979}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }