1. Schiff and Evans, Rev. Scient. Instrum.,7, 546 (1936).
2. V. S. Pugachev, Theory of Random Functions [in Russian], Moscow, Fizmatgiz (1962).
3. V. I. Gol'danskii, A. V. Kutsenko, and M. I. Podgoretskii, Statistics of Meters for Recording Nuclear Particles [in Russian], Moscow, Fizmatgiz (1959).
4. V. Price, Recording Nuclear Radiation [Russian translation], Moscow, Izd. Inostr. Lit. (1960).
5. L. S. Gorn and B. I. Khazanov, Radiation-Intensity Recorders [in Russian], Moscow, Atomizdat (1965).