M.G.~Minty, R.~Connolly, C.~Liu, T.~Summers, and S.~Tepikian,
   "Absolute Beam Emittance Measurements at RHIC Using Ionization Profile Monitors",
   in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper MOPF09, pp. 64–68,
    ISBN: 978-3-95450-141-0,
    \url{http://jacow.org/IBIC2014/papers/mopf09.pdf},
    2014.