1. Private communications with L. F. Hansen and J. J. Wesolouski, Lawrence Radiation Laboratory, Livermore, California.
2. F. S. Goulding and D. Landis, “Linear amplifier, gating and timing system”, Monterey Conference on Instrumentation Techniques in Nuclear Pulse Analysis, National Academy of Sciences, NRC Publ. 1184.
3. Proc. Ninth scintillation and semiconductor counter symposium;Hofstadter,1964