1. V. I. Kaidanov, I. A. Chernik, and B. A. Efimova, FTP, 1, No. 6, 869–879 (1967).
2. R. F. Brebrik and A. J. Strauss, Phys. Rew., 131, No. 1, 104–110 (1963).
3. N. Kh. Abrikosov, I. F. Bankina, L. V. Poretskaya, et al., Production and Properties of Compound Semiconductors [in Russian], Nauka, Moscow (1967).
4. A. S. Okhotin, A. A. Efimov, V. S. Okhotin, and A. S. Pushkarskii, Thermoelectric Converters [in Russian], Atomizdat, Moscow (1976).
5. E. I. Rogocheva, G. V. Gorne, N. K. Zhigareva, and A. B. Ivanova, Neorgan. Materialy, 27, No. 2, 267–270 (1991).