[n] D. Walz, R. Helm, J. Irwin, and W. R. Nelson, “Conventional Collimation and Linac Protection”, in Proc. PAC'93, Washington D.C., USA, Mar. 1993, pp. 185-188.
%\cite{Walz:PAC93} \bibitem{Walz:PAC93} D. Walz, R. Helm, J. Irwin, and W. R. Nelson, \textquotedblleft{Conventional Collimation and Linac Protection}\textquotedblright, in \emph{Proc. PAC’93}, Washington D.C., USA, Mar. 1993, pp. 185--188.
@inproceedings{walz:pac93, author = {D. Walz and R. Helm and J. Irwin and W. R. Nelson}, title = {{Conventional Collimation and Linac Protection}}, booktitle = {Proc. PAC'93}, pages = {185--188}, paper = {}, venue = {Washington D.C., USA, Mar. 1993}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }