%\cite{Savilov:FEL2015-TUP001}
\bibitem{Savilov:FEL2015-TUP001}
    A.V.~SavilovI.V.~Bandurkin,
   \textquotedblleft{THz Photo-Injector FEM Based on Spontaneous Coherent Emission from a Bunch of Negative-Mass Electrons}\textquotedblright,
%  in \emph{Proc. FEL2015}, TUP001, pp. 317--320,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper TUP001, pp. 317--320,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper TUP001, pp. 317--320,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup001.pdf},
    doi:10.18429/JACoW-FEL2015-TUP001, 2015.