Z.~Liu, J.L.~Crisp, and S.M.~Lidia,
   "AC Coupling Studies and Circuit Model for Loss Monitor Ring",
   in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper TUPD21, pp. 455–458,
    ISBN: 978-3-95450-141-0,
    \url{http://jacow.org/IBIC2014/papers/tupd21.pdf},
    2014.