%\cite{Davidyuk:FEL2015-WEP051}
\bibitem{Davidyuk:FEL2015-WEP051}
    I.V.~Davidyuk, O.A.~Shevchenko, V.G.~Tcheskidov, and N.~Vinokurov,
   \textquotedblleft{The Prototype of New Variable Period Undulator for Novosibirsk Free Electron Laser.}\textquotedblright,
%  in \emph{Proc. FEL2015}, WEP051, pp. 677--680,
%  in \emph{Proc. FEL2015}, Daejeon, Republic of Korea, August 2015, paper WEP051, pp. 677--680,
   in \emph{Proc. 37th International Free Electron Laser Conference (FEL2015)}, Daejeon, Republic of Korea, August 2015, paper WEP051, pp. 677--680,
    ISBN: 978-3-95450-134-2,
    \url{http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep051.pdf},
    doi:10.18429/JACoW-FEL2015-WEP051, 2015.
