[n] D. Betz et al., “Plasma Lenses for SLAC Final Focus Test Facility”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 619-622.
%\cite{Betz:PAC91} \bibitem{Betz:PAC91} D. Betz \emph{et al.}, \textquotedblleft{Plasma Lenses for SLAC Final Focus Test Facility}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 619--622.
@inproceedings{betz:pac91, author = {D. Betz and others}, title = {{Plasma Lenses for SLAC Final Focus Test Facility}}, booktitle = {Proc. PAC'91}, pages = {619--622}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }