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%\cite{li:napac2019-tuyba1}
\bibitem{li:napac2019-tuyba1}
S. Li,
\textquotedblleft{Generation and Characterization of Attosecond Pulses From X-Ray Free-Electron Laser}\textquotedblright,
% --- abbreviated form (UNpublished paper) - JACoW template Feb 2018 ---
presented at NAPAC'19, Lansing, MI, USA, Sep. 2019, paper TUYBA1, unpublished.