The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Kuhlmann:FEL2017-MOP036}
\bibitem{Kuhlmann:FEL2017-MOP036}
M. Kuhlmann, E. Schneidmiller, and M.V. Yurkov,
\textquotedblleft{Frequency Doubling Mode of Operation of Free Electron Laser FLASH2}\textquotedblright,
in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP036}, 2018.
% in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP036}, pp. 117--120.
% in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper MOP036, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP036}
% in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)},
% Santa Fe, NM, USA, Aug. 2017, paper MOP036, pp. 117--120,
% ISBN: 978-3-95450-179-3,
% \url{http://jacow.org/fel2017/papers/mop036.pdf},
% \url{https://doi.org/10.18429/JACoW-FEL2017-MOP036}, 2018.