 
The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Perini:IPAC2019-MOPTS099}
\bibitem{Perini:IPAC2019-MOPTS099}
   D. Perini, D.J. Crawford, J. Feng, G. Gobbi, Z. Li, W. Liu, \emph{et al.},
%   D. Perini, D.J. Crawford, J. Feng, G. Gobbi, Z. Li, W. Liu, J. Ruan, W. Shao, G. Stancari, L.R. Valerio, J. Wang, Y. Wang, Y. Yang, and K. Zhang,
%   D. Perini \emph{et al.},
   \textquotedblleft{The Development Programme of Cathodes and Electron Guns for the Hollow Electron Lenses of the High Luminosity LHC Project}\textquotedblright,
% --- abbreviated form (published paper) - JACoW template Feb 2018 ---
   in \emph{Proc. IPAC'19}, Melbourne, Australia, May 2019, pp. 1102--1105,
   \url{doi:10.18429/JACoW-IPAC2019-MOPTS099}
% --- complete form (published paper) - JACoW template Feb 2018 ---
%  in \emph{Proc. 10th International Particle Accelerator Conference (IPAC'19)}, Melbourne, Australia, May 2019,
%  pp. 1102--1105. \url{doi:10.18429/JACoW-IPAC2019-MOPTS099}
% --- additional material ---
%  ISBN: 978-3-95450-208-0, \url{http://jacow.org/ipac2019/papers/mopts099.pdf}