%\cite{Zeng:FEL2015-TUP023}
\bibitem{Zeng:FEL2015-TUP023}
    L.~Zeng, J.E.~Chen, Y.~Ding, S.~Huang, Z.~Huang, K.X.~Liu, \emph{et al.},
%   L. Zeng \emph{et al.},
   \textquotedblleft{A Modified Self-Seeded X-ray FEL Scheme Towards Shorter Wavelengths}\textquotedblright,
%  in \emph{Proc. FEL2015}, TUP023, pp. 409--411,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper TUP023, pp. 409--411,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper TUP023, pp. 409--411,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup023.pdf},
    doi:10.18429/JACoW-FEL2015-TUP023, 2015.