The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Serkez:FEL2017-MOP037} \bibitem{Serkez:FEL2017-MOP037} S. Serkez, G. Geloni, V. Kocharyan, T. Mazza, M. Meyer, and E. Saldin, \textquotedblleft{Opportunities for Two-Color Experiments at the SASE3 Undulator Line of the European XFEL}\textquotedblright, in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP037}, 2018. % in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP037}, pp. 121--124. % in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper MOP037, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP037} % in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)}, % Santa Fe, NM, USA, Aug. 2017, paper MOP037, pp. 121--124, % ISBN: 978-3-95450-179-3, % \url{http://jacow.org/fel2017/papers/mop037.pdf}, % \url{https://doi.org/10.18429/JACoW-FEL2017-MOP037}, 2018.