The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Zhang:IPAC2016-WEPOR058} \bibitem{Zhang:IPAC2016-WEPOR058} T. Zhang, W. Li, L. Shang, L. Wang, and C.-F. Wu, \textquotedblleft{Preliminary Study for the HLS Variable Pulse Length Storage Ring by Two Harmonic Cavities}\textquotedblright, % in \emph{Proc. IPAC2016}, pp. 2802--2804, % in \emph{Proc. IPAC2016}, Busan, Korea, Mar. 2016, paper WEPOR058, pp. 2802--2804, in \emph{Proc. 7th International Particle Accelerator Conference (IPAC'16)}, Busan, Korea, Mar. 2016, paper WEPOR058, pp. 2802--2804, % ISBN: 978-3-95450-147-2, \url{http://jacow.org/ipac2016/papers/wepor058.pdf}, \url{doi:10.18429/JACoW-IPAC2016-WEPOR058}, 2016.