[n] F. Hartemann et al., “A High-Power Free-Electron Maser for RF Acceleration”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 772-774.
%\cite{Hartemann:PAC91} \bibitem{Hartemann:PAC91} F. Hartemann \emph{et al.}, \textquotedblleft{A High-Power Free-Electron Maser for RF Acceleration}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 772--774.
@inproceedings{hartemann:pac91, author = {F. Hartemann and others}, title = {{A High-Power Free-Electron Maser for RF Acceleration}}, booktitle = {Proc. PAC'91}, pages = {772--774}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }