%\cite{Balal:FEL2015-MOP009}
\bibitem{Balal:FEL2015-MOP009}
    N.~Balal, V.L.~Bratman, and E.~Magori,
   \textquotedblleft{Efficient Electron Sources of Coherent Spontaneous Radiation with Combined Helical and Uniform Magnetic Fields}\textquotedblright,
%  in \emph{Proc. FEL2015}, MOP009, pp. 43--45,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper MOP009, pp. 43--45,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper MOP009, pp. 43--45,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop009.pdf},
    doi:10.18429/JACoW-FEL2015-MOP009, 2015.