The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Liu:FEL2017-TUP004}
\bibitem{Liu:FEL2017-TUP004}
S. Liu, W. Decking, G. Feng, G. Geloni, V. Kocharyan, S. Serkez, and \emph{et al.},
% S. Liu, W. Decking, G. Feng, G. Geloni, V. Kocharyan, S. Serkez, and I. Zagorodnov,
% S. Liu \emph{et al.},
\textquotedblleft{Longitudinal Phase Space Optimization for the Hard X-ray Self-Seeding}\textquotedblright,
in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP004}, 2018.
% in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP004}, pp. 259--262.
% in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper TUP004, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP004}
% in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)},
% Santa Fe, NM, USA, Aug. 2017, paper TUP004, pp. 259--262,
% ISBN: 978-3-95450-179-3,
% \url{http://jacow.org/fel2017/papers/tup004.pdf},
% \url{https://doi.org/10.18429/JACoW-FEL2017-TUP004}, 2018.