[n] N. F. Ziegler, “Coaxial Cavities for Separated Orbit Cyclotrons”, in Proc. PAC'67, Washington D.C., USA, Mar. 1967, pp. 331-336.
%\cite{Ziegler:PAC67} \bibitem{Ziegler:PAC67} N. F. Ziegler, \textquotedblleft{Coaxial Cavities for Separated Orbit Cyclotrons}\textquotedblright, in \emph{Proc. PAC’67}, Washington D.C., USA, Mar. 1967, pp. 331--336.
@inproceedings{ziegler:pac67, author = {N. F. Ziegler}, title = {{Coaxial Cavities for Separated Orbit Cyclotrons}}, booktitle = {Proc. PAC'67}, pages = {331--336}, paper = {}, venue = {Washington D.C., USA}, series = {Particle Accelerator Conference}, number = {2}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1967}, language = {english} }