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%\cite{Tian:SRF2017-THXA07}
\bibitem{Tian:SRF2017-THXA07}
H. Tian,
\textquotedblleft{Progress with Bipolar HF-free EP and other VEP of Niobium Cavities}\textquotedblright,
presented at SRF2017, Lanzhou, China, July 2017, paper THXA07, unpublished.
% presented at the 18th Int. Conf. on RF Superconductivity (SRF'17), Lanzhou, China, July 2017, paper THXA07, unpublished.