[n] J. M. Helleboid et al., “First Results with the Charging System of the VIVITRON”, in Proc. EPAC'90, Nice, France, Jun. 1990, pp. 494-497.
%\cite{Helleboid:EPAC90} \bibitem{Helleboid:EPAC90} J. M. Helleboid \emph{et al.}, \textquotedblleft{First Results with the Charging System of the VIVITRON}\textquotedblright, in \emph{Proc. EPAC’90}, Nice, France, Jun. 1990, pp. 494--497.
@inproceedings{helleboid:epac90, author = {J. M. Helleboid and others}, title = {{First Results with the Charging System of the VIVITRON}}, booktitle = {Proc. EPAC'90}, pages = {494--497}, paper = {}, venue = {Nice, France, Jun. 1990}, series = {European Particle Accelerator Conference}, number = {2}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }