The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Wang:IPAC2017-WEPIK018} \bibitem{Wang:IPAC2017-WEPIK018} Y. Wang, T.J. Bian, J. Gao, H. Geng, B. Sha, F. Su, \emph{et al.}, % Y. Wang, T.J. Bian, J. Gao, H. Geng, B. Sha, F. Su, D. Wang, C.H. Yu, and Y. Zhang, % Y. Wang \emph{et al.}, \textquotedblleft{Optics Design for Cepc Double Ring Scheme}\textquotedblright, % in \emph{Proc. IPAC2017}, pp. 2962--2964, % in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper WEPIK018, pp. 2962--2964, in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)}, Copenhagen, Denmark, May 2017, paper WEPIK018, pp. 2962--2964, % ISBN: 978-3-95450-182-3, \url{http://jacow.org/ipac2017/papers/wepik018.pdf}, \url{https://doi.org/10.18429/JACoW-IPAC2017-WEPIK018}, 2017.