%\cite{Zhou:FEL2015-WEP003}
\bibitem{Zhou:FEL2015-WEP003}
    F.~Zhou, D.K.~Bohler, Y.~Ding, S.~Gilevich, Z.~Huang, H.~Loos, and D.F.~Ratner,
%   F. Zhou \emph{et al.},
   \textquotedblleft{Recent Understanding and Improvements of the LCLS Injector}\textquotedblright,
%  in \emph{Proc. FEL2015}, WEP003, pp. 592--596,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper WEP003, pp. 592--596,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper WEP003, pp. 592--596,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep003.pdf},
    doi:10.18429/JACoW-FEL2015-WEP003, 2015.