1. E. L. Ivchenko, Fiz. Tverd. Tela, 14, 3489 (1972).
2. R. Y. Rasulov, Optical and Photovoltaic Polarization Effects in Semiconductors at Linear and Nonlinear Absorption of Light [in Russian], Thesis for the Degree of Doctor of Phys. and Math. Sciences, Ioffe Physical Technical Institute of the Russian Academy of Sciences, St. Petersburg (1993).
3. S. D. Ganichev, E. L. Ivchenko, R. Ya. Rasulov, et al., Fiz. Tverd. Tela, 35, No. 1, 198 (1993).
4. D. A. Parshin and A. R. Shabaev, Zh. Exp. Teor. Fiz., 86, No. 2, 1471 (1987).
5. S. D. Ganichev, S. A. Emel’yanov, E. L. Ivchenko, et al., Zh. Exp. Teor. Fiz., 34, No. 2, 729 (1986).