The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Wang:FEL2017-TUP039}
\bibitem{Wang:FEL2017-TUP039}
G. Wang, Y.C. Jing, V. Litvinenko, and J. Ma,
\textquotedblleft{Electron Beam Requirements for Coherent Electron Cooling FEL System}\textquotedblright,
in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP039}, 2018.
% in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP039}, pp. 323--325.
% in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper TUP039, \url{https://doi.org/10.18429/JACoW-FEL2017-TUP039}
% in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)},
% Santa Fe, NM, USA, Aug. 2017, paper TUP039, pp. 323--325,
% ISBN: 978-3-95450-179-3,
% \url{http://jacow.org/fel2017/papers/tup039.pdf},
% \url{https://doi.org/10.18429/JACoW-FEL2017-TUP039}, 2018.