The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{LePimpec:FEL2017-MOP044} \bibitem{LePimpec:FEL2017-MOP044} F. Le Pimpec, \textquotedblleft{Commissioning Status of the European XFEL Photon Beam System}\textquotedblright, in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP044}, 2018. % in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP044}, pp. 144--148. % in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper MOP044, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP044} % in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)}, % Santa Fe, NM, USA, Aug. 2017, paper MOP044, pp. 144--148, % ISBN: 978-3-95450-179-3, % \url{http://jacow.org/fel2017/papers/mop044.pdf}, % \url{https://doi.org/10.18429/JACoW-FEL2017-MOP044}, 2018.