[n] F. Willeke and F. Zimmerman, “The Impact of Persistent Current Field Errors on the Stability of the Proton Beam in the HERA Proton Ring”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 2483-2488.
%\cite{Willeke:PAC91} \bibitem{Willeke:PAC91} F. Willeke and F. Zimmerman, \textquotedblleft{The Impact of Persistent Current Field Errors on the Stability of the Proton Beam in the HERA Proton Ring}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 2483--2488.
@inproceedings{willeke:pac91, author = {F. Willeke and F. Zimmerman}, title = {{The Impact of Persistent Current Field Errors on the Stability of the Proton Beam in the HERA Proton Ring}}, booktitle = {Proc. PAC'91}, pages = {2483--2488}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }