%\cite{Duris:FEL2015-WEC02}
\bibitem{Duris:FEL2015-WEC02}
    J.P.~DurisP.~Musumeci,
   \textquotedblleft{High Gradient IFEL Acceleration and Deceleration in Strongly Tapered Undulators}\textquotedblright,
%  presented at FEL2015, Daejeon, Republic of Korea, August 2015, paper WEC02, unpublished.
   presented at the 37th International Free Electron Laser Conference (FEL2015), Daejeon, Republic of Korea, August 2015, paper WEC02, unpublished.