[n] B. Efken et al., “A Combination of a Van de Graaff Accelerator and a Splitpole Cyclotron for Heavy Ions”, in Proc. Cyclotrons'72, Vancouver, Canada, Jul. 1972, pp. 63-69.
%\cite{Efken:Cyclotrons72} \bibitem{Efken:Cyclotrons72} B. Efken \emph{et al.}, \textquotedblleft{A Combination of a Van de Graaff Accelerator and a Splitpole Cyclotron for Heavy Ions}\textquotedblright, in \emph{Proc. Cyclotrons’72}, Vancouver, Canada, Jul. 1972, pp. 63--69.
@inproceedings{efken:cyclotrons72, author = {B. Efken and others}, title = {{A Combination of a Van de Graaff Accelerator and a Splitpole Cyclotron for Heavy Ions}}, booktitle = {Proc. Cyclotrons'72}, pages = {63--69}, paper = {}, venue = {Vancouver, Canada, Jul. 1972}, publisher = {JACoW Publishing, Geneva, Switzerland}, language = {english} }