The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Healy:IPAC2017-WEPVA019} \bibitem{Healy:IPAC2017-WEPVA019} A.L. Healy, G. Burt, D.M. Graham, and S.P. Jamison, \textquotedblleft{Group Velocity Matching in Dielectric-Lined Waveguides and its Role in Electron-THz Interaction}\textquotedblright, % in \emph{Proc. IPAC2017}, pp. 3296--3298, % in \emph{Proc. IPAC2017}, Copenhagen, Denmark, May 2017, paper WEPVA019, pp. 3296--3298, in \emph{Proc. 8th Int. Particle Accelerator Conf. (IPAC'17)}, Copenhagen, Denmark, May 2017, paper WEPVA019, pp. 3296--3298, % ISBN: 978-3-95450-182-3, \url{http://jacow.org/ipac2017/papers/wepva019.pdf}, \url{https://doi.org/10.18429/JACoW-IPAC2017-WEPVA019}, 2017.