The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Pierini:IPAC2017-MOPVA066} \bibitem{Pierini:IPAC2017-MOPVA066} P. Pierini, A. Bosotti, J. Branlard, D. Kostin, C.G. Maiano, W.-D. Möller, \emph{et al.}, % P. Pierini, A. Bosotti, J. Branlard, D. Kostin, C.G. Maiano, W.-D. Möller, R. Paparella, D. Reschke, J.K. Sekutowicz, D. Sertore, and E. Vogel, % P. Pierini \emph{et al.}, \textquotedblleft{Limits for the Operation of the European XFEL 3.9 GHz System in CW Mode}\textquotedblright, % in \emph{Proc. IPAC2017}, pp. 1023--1026, % in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper MOPVA066, pp. 1023--1026, in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)}, Copenhagen, Denmark, May 2017, paper MOPVA066, pp. 1023--1026, % ISBN: 978-3-95450-182-3, \url{http://jacow.org/ipac2017/papers/mopva066.pdf}, \url{https://doi.org/10.18429/JACoW-IPAC2017-MOPVA066}, 2017.