L.Y.~Lin,
   "Study of scintillation stability in KBr, YAG:Ce, CaF2:Eu and CsI:Tl Irradiated by Various-Energy Protons",
   in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper TUCYB1, pp. 250–253,
    ISBN: 978-3-95450-141-0,
    \url{http://jacow.org/IBIC2014/papers/tucyb1.pdf},
    2014.