%\cite{Znidarcic:FEL2015-TUP044}
\bibitem{Znidarcic:FEL2015-TUP044}
    M.~Žnidarčič,
   \textquotedblleft{Spark EL - Single Pass BPM}\textquotedblright,
%  in \emph{Proc. FEL2015}, TUP044, pp. 471--473,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper TUP044, pp. 471--473,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper TUP044, pp. 471--473,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup044.pdf},
    doi:10.18429/JACoW-FEL2015-TUP044, 2015.