1. Yu. V. Rud’, Fiz. Tekh. Poluprovodn. 28, 1105 (1994) [Semiconductors 28, 633 (1994)].
2. N. P. Barnes, Int. J. Nonlinear Optical Phys. 1, 639 (1991).
3. P. A. Budni, P. G. Schunemann, M. G. Knights, T. M. Pollak, and E. P. Chicklis, OSA Proceedings on Advanced Solid State Lasers, edited by L. Chase and A. A. Pinto (Optical Society of America, Washington, DC, 1992). Vol. 13. p. 380.
4. Handbook of Physicochemical Properties of Semiconductors [in Russian], Nauka, Moscow (1978).
5. B. L. Sharma and R. K. Purohit, Semiconductor Heterojunctions (Pergamon Press, Oxford, 1974) [Russ. transl., Sov. Radio, Moscow, 1979].