The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Shao:IPAC2016-TUPOW015}
\bibitem{Shao:IPAC2016-TUPOW015}
J.H. Shao, S.P. Antipov, S.V. Baryshev, H.B. Chen, M.E. Conde, W. Gai, \emph{et al.},
% J.H. Shao, S.P. Antipov, S.V. Baryshev, H.B. Chen, M.E. Conde, W. Gai, G. Ha, C.-J. Jing, J. Shi, F.Y. Wang, E.E. Wisniewski, and X.W. Wu,
% J.H. Shao \emph{et al.},
\textquotedblleft{Experiment of High Resolution Field Emission Imaging in an rf Photocathode Gun}\textquotedblright,
% in \emph{Proc. IPAC2016}, pp. 1772--1774,
% in \emph{Proc. IPAC2016}, Busan, Korea, May 2016, paper TUPOW015, pp. 1772--1774,
in \emph{Proc. 7th Int. Particle Accelerator Conf. (IPAC'16)},
Busan, Korea, May 2016, paper TUPOW015, pp. 1772--1774,
% ISBN: 978-3-95450-147-2,
\url{http://jacow.org/ipac2016/papers/tupow015.pdf},
\url{doi:10.18429/JACoW-IPAC2016-TUPOW015}, 2016.