%\cite{Wang:FEL2015-TUP066}
\bibitem{Wang:FEL2015-TUP066}
    L.~Wang, P.~Emma, J.~Qiang, and T.O.~Raubenheimer,
   \textquotedblleft{Benchmark of ELEGANT and IMPACT}\textquotedblright,
%  in \emph{Proc. FEL2015}, TUP066, pp. 505--507,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper TUP066, pp. 505--507,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper TUP066, pp. 505--507,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup066.pdf},
    doi:10.18429/JACoW-FEL2015-TUP066, 2015.