The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{kato:fel2019-tha03} \bibitem{kato:fel2019-tha03} R. Kato, Y. Honda, H. Kawata, T. Miyajima, N. Nakamura, H. Sakai, \emph{et al.}, % R. Kato, Y. Honda, H. Kawata, T. Miyajima, N. Nakamura, H. Sakai, M. Shimada, Y. Tanimoto, and K. Tsuchiya, % R. Kato \emph{et al.}, \textquotedblleft{IR-FEL Project at the cERL and Future EUV-FEL Lithography}\textquotedblright, % --- abbreviated form (UNpublished paper) - JACoW template Feb 2018 --- presented at FEL'19, Hamburg, Germany, Aug. 2019, paper THA03, unpublished.