U. Schneekloth \emph{et al.}, "Calibration of OLYMPUS/DORIS Beam Position Monitors", in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper TUPF09, pp. 324–326, ISBN: 978-3-95450-141-0, \url{http://jacow.org/IBIC2014/papers/tupf09.pdf}, 2014.