M.~Palm, E.~Bravin, and S.~Mazzoni, "Near-Saturation Single-Photon Avalanche Diode Afterpulse and Sensitivity Correction Scheme for the LHC Longitudinal Density Monitor", in Proc. 3rd International Beam Instrumentation Conference, Monterey, CA, USA, paper MOPD11, pp. 169–173, ISBN: 978-3-95450-141-0, \url{http://jacow.org/IBIC2014/papers/mopd11.pdf}, 2014.