The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{liu:ipac2021-tupab296}
\bibitem{liu:ipac2021-tupab296}
W. Liu, L.R. Doolittle, D.S. Doran, D. Filippetto, G. Ha, D. Li, \emph{et al.},
% W. Liu, L.R. Doolittle, D.S. Doran, D. Filippetto, G. Ha, D. Li, S. Paiagua, P. Piot, J.G. Power, C. Serrano, J.H. Shao, V.K. Vytla, C. Whiteford, and E.E. Wisniewski,
% W. Liu \emph{et al.},
\textquotedblleft{LLRF Upgrade at the Argonne Wakefield Accelerator Test Facility}\textquotedblright,
% --- abbreviated form (published paper) - JACoW template Feb 2018 ---
in \emph{Proc. IPAC'21}, Campinas, SP, Brazil, May 2021, pp. 2176--2177.
\url{doi:10.18429/JACoW-IPAC2021-TUPAB296}
% --- additional material -ISSN/ISBN--
% ISBN: 978-3-95450-214-1, ISSN: 2673-5490