The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Bettoni:FEL2017-THB04}
\bibitem{Bettoni:FEL2017-THB04}
S. Bettoni, E. Prat, and S. Reiche,
\textquotedblleft{Two-Color Beam Generation via Wakefield Excitation}\textquotedblright,
presented at FEL2017, Santa Fe, NM, USA, Aug. 2017, paper THB04, unpublished.
% presented at the 38th Int. Free Electron Laser Conf. (FEL'17), Santa Fe, NM, USA, Aug. 2017, paper THB04, unpublished.