[n] Ch. Leemann et al., “A Heavy Ion Facility for Radiation Therapy”, in Proc. PAC'77, Chicago, IL, USA, Mar. 1977, pp. 986-989.
%\cite{Leemann:PAC77} \bibitem{Leemann:PAC77} Ch. Leemann \emph{et al.}, \textquotedblleft{A Heavy Ion Facility for Radiation Therapy}\textquotedblright, in \emph{Proc. PAC’77}, Chicago, IL, USA, Mar. 1977, pp. 986--989.
@inproceedings{leemann:pac77, author = {Ch. Leemann and others}, title = {{A Heavy Ion Facility for Radiation Therapy}}, booktitle = {Proc. PAC'77}, pages = {986--989}, paper = {}, venue = {Chicago, IL, USA, Mar. 1977}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }