%\cite{Schneidmiller:FEL2015-TUP021}
\bibitem{Schneidmiller:FEL2015-TUP021}
    E.~SchneidmillerM.V.~Yurkov,
   \textquotedblleft{Fundamental Limitations of the SASE FEL Photon Beam Pointing Stability}\textquotedblright,
%  in \emph{Proc. FEL2015}, TUP021, pp. 397--404,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper TUP021, pp. 397--404,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper TUP021, pp. 397--404,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup021.pdf},
    doi:10.18429/JACoW-FEL2015-TUP021, 2015.