%\cite{Feng:FEL2015-MOP084}
\bibitem{Feng:FEL2015-MOP084}
    G.~Feng, W.~Decking, M.~Dohlus, K.E.~Hacker, T.~Limberg, T.~Plath, and I.~Zagorodnov,
%   G. Feng \emph{et al.},
   \textquotedblleft{Seeded FEL Study for the Cascaded HGHG option for FLASH2}\textquotedblright,
%  in \emph{Proc. FEL2015}, MOP084, pp. 246--250,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP084, pp. 246--250,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP084, pp. 246--250,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop084.pdf},
    doi:10.18429/JACoW-FEL2015-MOP084, 2015.