[n] F. Willeke, “A B-Factory in the PETRA Tunnel”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 135-138.
%\cite{Willeke:PAC91} \bibitem{Willeke:PAC91} F. Willeke, \textquotedblleft{A B-Factory in the PETRA Tunnel}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 135--138.
@inproceedings{willeke:pac91, author = {F. Willeke}, title = {{A B-Factory in the PETRA Tunnel}}, booktitle = {Proc. PAC'91}, pages = {135--138}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }