The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Ohmi:IPAC2017-WEPIK073}
\bibitem{Ohmi:IPAC2017-WEPIK073}
K. Ohmi,
\textquotedblleft{Three Dimensional Wake Field for an Electron Moving in Undulator}\textquotedblright,
% in \emph{Proc. IPAC2017}, pp. 3098--3100,
% in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper WEPIK073, pp. 3098--3100,
in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)},
Copenhagen, Denmark, May 2017, paper WEPIK073, pp. 3098--3100,
% ISBN: 978-3-95450-182-3,
\url{http://jacow.org/ipac2017/papers/wepik073.pdf},
\url{https://doi.org/10.18429/JACoW-IPAC2017-WEPIK073}, 2017.