1. W.B. Atwood, Lecture at SLAC Summer Institute, 1980, p. 287.
2. M. Bonesini, A review of recent techniques of tof detectors, in: 8th ICATPP Conference, Villa Olmo, Conference Proceedings, 2003.
3. S.O. Flyckt, C. Marmorier, Photomultiplier Tubes, Principles and Applications, Photonis, 2002; Hamamatsu Photonics K.K., Photomultiplier Tubes, Basics and Applications, 3rd ed., 2006; R. Rikitake, Magnetic and Electromagnetic Shielding, Terra Scientific Publishing, Tokyo, 1988.
4. M. De Gerone, et al., preprint arXiv:1112.0110, 2011.
5. A limit for the decay from the MEG experiment