G.~Kube,
   "Radiation Sources and Their Application for Beam Profile Diagnostics",
   in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper TUIZB1, pp. 263–273,
    ISBN: 978-3-95450-141-0,
    \url{http://jacow.org/IBIC2014/papers/tuizb1.pdf},
    2014.