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%\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% --- abbreviated form (UNpublished paper) - JACoW template Feb 2018 ---
presented at FEL'19, Hamburg, Germany, Aug. 2019, paper THA03, unpublished.