The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Duan:IPAC2019-MOPMP012}
\bibitem{Duan:IPAC2019-MOPMP012}
Z. Duan, J. Gao, X.P. Li, D. Wang, Y. Wang, W.H. Xia, \emph{et al.},
% Z. Duan, J. Gao, X.P. Li, D. Wang, Y. Wang, W.H. Xia, Q.J. Xu, C.H. Yu, and Y. Zhang,
% Z. Duan \emph{et al.},
\textquotedblleft{Concepts of Longitudinally Polarized Electron and Positron Colliding Beams in the Circular Electron Positron Collider}\textquotedblright,
% --- abbreviated form (published paper) - JACoW template Feb 2018 ---
in \emph{Proc. IPAC'19}, Melbourne, Australia, May 2019, pp. 445--448,
\url{doi:10.18429/JACoW-IPAC2019-MOPMP012}
% --- complete form (published paper) - JACoW template Feb 2018 ---
% in \emph{Proc. 10th International Particle Accelerator Conference (IPAC'19)}, Melbourne, Australia, May 2019,
% pp. 445--448. \url{doi:10.18429/JACoW-IPAC2019-MOPMP012}
% --- additional material ---
% ISBN: 978-3-95450-208-0, \url{http://jacow.org/ipac2019/papers/mopmp012.pdf}