[n] E. Keil, “Beam-Beam Effects in Electron and Proton Colliders”, in Proc. PAC'89, Chicago, IL, USA, Mar. 1989, pp. 1731-1736.
%\cite{Keil:PAC89} \bibitem{Keil:PAC89} E. Keil, \textquotedblleft{Beam-Beam Effects in Electron and Proton Colliders}\textquotedblright, in \emph{Proc. PAC’89}, Chicago, IL, USA, Mar. 1989, pp. 1731--1736.
@inproceedings{keil:pac89, author = {E. Keil}, title = {{Beam-Beam Effects in Electron and Proton Colliders}}, booktitle = {Proc. PAC'89}, pages = {1731--1736}, paper = {}, venue = {Chicago, IL, USA, Mar. 1989}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }