The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{yang:fel2019-mod04}
\bibitem{yang:fel2019-mod04}
X. Yang, L. Giannessi, and N.S. Mirian,
\textquotedblleft{Post-Saturation Dynamics and Superluminal Propagation of a Super-Radiant Spike in a Free-Electrons Laser Amplifier}\textquotedblright,
% --- abbreviated form (UNpublished paper) - JACoW template Feb 2018 ---
presented at FEL'19, Hamburg, Germany, Aug. 2019, paper MOD04, unpublished.