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%\cite{Guetg:FEL2017-TUA03}
\bibitem{Guetg:FEL2017-TUA03}
M.W. Guetg, F.-J. Decker, Y. Ding, Z. Huang, A.A. Lutman, and T.J. Maxwell,
\textquotedblleft{Generation of High Power, Short X-Ray FEL Pulses}\textquotedblright,
presented at FEL2017, Santa Fe, NM, USA, Aug. 2017, paper TUA03, unpublished.
% presented at the 38th Int. Free Electron Laser Conf. (FEL'17), Santa Fe, NM, USA, Aug. 2017, paper TUA03, unpublished.