%\cite{Lee:FEL2015-MOP081}
\bibitem{Lee:FEL2015-MOP081}
    J.~Lee, B.H.~Oh, and M.~Yoon,
   \textquotedblleft{Generating a Single-Spike SASE Pulse in the Soft X-Ray Regime by Velocity Bunching}\textquotedblright,
%  in \emph{Proc. FEL2015}, MOP081, pp. 233--236,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP081, pp. 233--236,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP081, pp. 233--236,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop081.pdf},
    doi:10.18429/JACoW-FEL2015-MOP081, 2015.