The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Adelmann:Cyclotrons2016-WEA04}
\bibitem{Adelmann:Cyclotrons2016-WEA04}
A. Adelmann, A. Gsell, Y. Ineichen, C.J. Metzger-Kraus, X. Pang, V. Rizzoglio, \emph{et al.},
% A. Adelmann, A. Gsell, Y. Ineichen, C.J. Metzger-Kraus, X. Pang, V. Rizzoglio, C.T. Rogers, S.J. Russell, S.L. Sheehy, C. Wang, D. Winklehner, and J.J. Yang,
% A. Adelmann \emph{et al.},
\textquotedblleft{Update on OPAL}\textquotedblright,
% presented at Cyclotrons2016, Zurich, Switzerland, Sep. 2016, paper WEA04, unpublished.
presented at the 21st Int. Conf. on Cyclotrons and Their Applications (Cyclotrons'16), Zurich, Switzerland, Sep. 2016, paper WEA04, unpublished.