The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
%\cite{Shiltsev:NAPAC2016-TUPOB07} \bibitem{Shiltsev:NAPAC2016-TUPOB07} V.D. Shiltsev, \textquotedblleft{Considerations on Energy Frontier Colliders After LHC}\textquotedblright, % in \emph{Proc. NAPAC2016}, pp. 493--496, % in \emph{Proc. NAPAC2016}, Chicago, IL, USA, Oct. 2016, paper TUPOB07, pp. 493--496, in \emph{Proc. North American Particle Accelerator Conf. (NAPAC'16)}, Chicago, IL, USA, Oct. 2016, paper TUPOB07, pp. 493--496, % ISBN: 978-3-95450-180-9, \url{https://jacow.org/napac2016/papers/tupob07.pdf}, \url{https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB07}, 2017.