The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Geng:IPAC2016-THPOR017}
\bibitem{Geng:IPAC2016-THPOR017}
H. Geng, S. Bai, W. Chou, X. Cui, Z. Duan, J. Gao, \emph{et al.},
% H. Geng, S. Bai, W. Chou, X. Cui, Z. Duan, J. Gao, Y.Y. Guo, Y.M. Peng, Q. Qin, F. Su, D. Wang, N. Wang, Y. Wang, G. Xu, Y. Yue, and Y. Zhang,
% H. Geng \emph{et al.},
\textquotedblleft{Dynamic Aperture Optimization at CEPC with Pretzel Orbit}\textquotedblright,
% in \emph{Proc. IPAC2016}, pp. 3808--3810,
% in \emph{Proc. IPAC2016}, Busan, Korea, May 2016, paper THPOR017, pp. 3808--3810,
in \emph{Proc. 7th Int. Particle Accelerator Conf. (IPAC'16)},
Busan, Korea, May 2016, paper THPOR017, pp. 3808--3810,
% ISBN: 978-3-95450-147-2,
\url{http://jacow.org/ipac2016/papers/thpor017.pdf},
\url{doi:10.18429/JACoW-IPAC2016-THPOR017}, 2016.