[n] A. van Steenbergen, “Two-Turn Extraction from an Injector Synchrotron”, in Proc. PAC'69, Washington D.C., USA, Mar. 1969, pp. 246-255.
%\cite{van Steenbergen:PAC69} \bibitem{van Steenbergen:PAC69} A. van Steenbergen, \textquotedblleft{Two-Turn Extraction from an Injector Synchrotron}\textquotedblright, in \emph{Proc. PAC’69}, Washington D.C., USA, Mar. 1969, pp. 246--255.
@inproceedings{van steenbergen:pac69, author = {A. van Steenbergen}, title = {{Two-Turn Extraction from an Injector Synchrotron}}, booktitle = {Proc. PAC'69}, pages = {246--255}, paper = {}, venue = {Washington D.C., USA}, series = {Particle Accelerator Conference}, number = {3}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1969}, language = {english} }