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%\cite{Pei:RuPAC2016-WEPSB043}
\bibitem{Pei:RuPAC2016-WEPSB043}
Y.J. Pei, Q.S. Chen, M. Fan, G. Feng, X.Y. He, Y. Hong, \emph{et al.},
% Y.J. Pei, Q.S. Chen, M. Fan, G. Feng, X.Y. He, Y. Hong, T. Hu, G. Huang, D. Jia, K. Jin, P. Lu, B. Qin, L. Shang, L.G. Shen, B.G. Sun, P. Tan, Zh. X. Tang, W. Wei, Y.Q. Xiong, K. Xuan, and Z. Zhao,
% Y.J. Pei \emph{et al.},
\textquotedblleft{Status of a THz source based on a FEL}\textquotedblright,
% presented at RuPAC2016, St. Petersburg, Russia, Nov. 2016, paper WEPSB043, unpublished.
presented at the 25th Russian Particle Accelerator Conf. (RuPAC'16), St. Petersburg, Russia, Nov. 2016, paper WEPSB043, unpublished.