The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Zhao:IPAC2018-THPMK138}
\bibitem{Zhao:IPAC2018-THPMK138}
Z. Zhao, L.J. Chen, Q.K. Jia, and H.T. Li,
\textquotedblleft{Power Enhancement of Free-Electron Lasers Oscillators With the Natural Gradient of a Planar Undulators}\textquotedblright,
% --- abbreviated form (published paper) - JACoW template Feb 2018 ---
in \emph{Proc. IPAC'18}, Vancouver, BC, Canada, Apr. 4,, pp. 4632--4634,
\url{doi:10.18429/JACoW-IPAC2018-THPMK138}
% --- complete form (published paper) - JACoW template Feb 2018 ---
% in \emph{Proc. 9th International Particle Accelerator Conference (IPAC'18)}, Vancouver, BC, Canada, Apr. 4,,
% pp. 4632--4634, \url{doi:10.18429/JACoW-IPAC2018-THPMK138}
% --- additional material ---
% ISBN: 978-3-95450-184-7, \url{http://jacow.org/ipac2018/papers/thpmk138.pdf}