The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Marcus:FEL2017-MOP061}
\bibitem{Marcus:FEL2017-MOP061}
G. Marcus, Y. Ding, J.P. Duris, Y. Feng, Z. Huang, K.-J. Kim, \emph{et al.},
% G. Marcus, Y. Ding, J.P. Duris, Y. Feng, Z. Huang, K.-J. Kim, J. Krzywinski, R.R. Lindberg, T.J. Maxwell, D.C. Nguyen, D.F. Ratner, T.O. Raubenheimer, and Yu. Shvyd'ko,
% G. Marcus \emph{et al.},
\textquotedblleft{X-ray Regenerative Amplifier Free-Electron Laser Concepts for LCLS-II}\textquotedblright,
in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP061}, 2018.
% in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP061}, pp. 192--195.
% in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper MOP061, \url{https://doi.org/10.18429/JACoW-FEL2017-MOP061}
% in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)},
% Santa Fe, NM, USA, Aug. 2017, paper MOP061, pp. 192--195,
% ISBN: 978-3-95450-179-3,
% \url{http://jacow.org/fel2017/papers/mop061.pdf},
% \url{https://doi.org/10.18429/JACoW-FEL2017-MOP061}, 2018.