[n] T. H. Johnson et al., “The University of Maryland Isochronous Cyclotron”, in Proc. PAC'69, Washington D.C., USA, Mar. 1969, pp. 438-442.
%\cite{Johnson:PAC69} \bibitem{Johnson:PAC69} T. H. Johnson \emph{et al.}, \textquotedblleft{The University of Maryland Isochronous Cyclotron}\textquotedblright, in \emph{Proc. PAC’69}, Washington D.C., USA, Mar. 1969, pp. 438--442.
@inproceedings{johnson:pac69, author = {T. H. Johnson and others}, title = {{The University of Maryland Isochronous Cyclotron}}, booktitle = {Proc. PAC'69}, pages = {438--442}, paper = {}, venue = {Washington D.C., USA}, series = {Particle Accelerator Conference}, number = {3}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1969}, language = {english} }