[n] D. K. Olsen et al., “Radioactive Beams with the HHIRF Accelerators”, in Proc. PAC'91, San Francisco, CA, USA, May 1991, pp. 2604-2607.
%\cite{Olsen:PAC91} \bibitem{Olsen:PAC91} D. K. Olsen \emph{et al.}, \textquotedblleft{Radioactive Beams with the HHIRF Accelerators}\textquotedblright, in \emph{Proc. PAC’91}, San Francisco, CA, USA, May 1991, pp. 2604--2607.
@inproceedings{olsen:pac91, author = {D. K. Olsen and others}, title = {{Radioactive Beams with the HHIRF Accelerators}}, booktitle = {Proc. PAC'91}, pages = {2604--2607}, paper = {}, venue = {San Francisco, CA, USA, May 1991}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }