M.S. Sanjari \emph{et al.},
   "Conceptual Design of Elliptical Cavity Beam Position Monitors for Heavy Ion Storage Rings",
   in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper WEPD03, pp. 634–636,
    ISBN: 978-3-95450-141-0,
    \url{http://jacow.org/IBIC2014/papers/wepd03.pdf},
    2014.