%\cite{Yan:FEL2015-WEB01}
\bibitem{Yan:FEL2015-WEB01}
    J.~Yan, H.~Hao, S.~Huang, J.Y.~Li, S.F.~Mikhailov, V.~Popov, \emph{et al.},
%   J. Yan \emph{et al.},
   \textquotedblleft{A Two-Color Storage Ring FEL}\textquotedblright,
%  in \emph{Proc. FEL2015}, WEB01, pp. 571--575,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper WEB01, pp. 571--575,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper WEB01, pp. 571--575,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/web01.pdf},
    doi:10.18429/JACoW-FEL2015-WEB01, 2015.