B. M. Askerov, Kinetic Effects in Semiconductors [in Russian], Nauka, Leningrad (1970), p. 303.
S. V. Vonsovskii, Magnetism [in Russian], Nauka, Moscow (1971), p. 1032.
S. V. Vonsovskii and V. I. Katsnel'son, Quantum Physics of Solids [in Russian], Nauka, Moscow (1983), p. 336.
B. M. Askerov, Electronic Transfer Phenomena in Semiconductors [in Russian], Nauka, Moscow (1985), p. 318.
G. A. Shul'man, Astron. Zh.,68, 101–108 (1991).
G. A. Shul'man, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 6, 9–13 (1992).
G. A. Shul'man, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 9, 3–7 (1993).
G. A. Shul'man, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 9, 5–9 (1991).