The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Wang:FEL2017-WEP063}
\bibitem{Wang:FEL2017-WEP063}
D. Wang, H.X. Deng, and Z. Jiang,
\textquotedblleft{A Two-in-One Type Undulator}\textquotedblright,
in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-WEP063}, 2018.
% in \emph{Proc. FEL2017}, \url{https://doi.org/10.18429/JACoW-FEL2017-WEP063}, pp. 547--549.
% in \emph{Proc. FEL2017}, Santa Fe, NM, USA, Aug. 2017, paper WEP063, \url{https://doi.org/10.18429/JACoW-FEL2017-WEP063}
% in \emph{Proc. 38th Int. Free Electron Laser Conf. (FEL'17)},
% Santa Fe, NM, USA, Aug. 2017, paper WEP063, pp. 547--549,
% ISBN: 978-3-95450-179-3,
% \url{http://jacow.org/fel2017/papers/wep063.pdf},
% \url{https://doi.org/10.18429/JACoW-FEL2017-WEP063}, 2018.