The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{vogel(fogel):fel2019-wep045}
\bibitem{vogel(fogel):fel2019-wep045}
V. Vogel (Fogel), M. Bousonville, A. Cherepenko, S. Choroba, H.-J. Eckoldt, T. Grevsmühl, \emph{et al.},
% V. Vogel (Fogel), M. Bousonville, A. Cherepenko, S. Choroba, H.-J. Eckoldt, T. Grevsmühl, V.V. Katalev, K. Machau, P. Morozov, and B. Yildirim,
% V. Vogel (Fogel) \emph{et al.},
\textquotedblleft{Status of the Klystrons for the European XFEL after Commissioning and First User Operation Phase}\textquotedblright,
% --- abbreviated form (published paper) - JACoW template Feb 2018 ---
in \emph{Proc. FEL'19}, Hamburg, Germany, Aug. 2019, pp. 420--422.
\url{doi:10.18429/JACoW-FEL2019-WEP045}
% --- additional material -ISSN/ISBN--
% ISBN: 978-3-95450-210-3, ISSN: ""