1. M. N. Magomedov, Sov. Phys. Solid State 34(12), 1991 (1992).
2. M. N. Magomedov, Sov. Phys. Solid State 34(12), 1994 (1992).
3. M. N. Magomedov, Zh. Fiz. Khim. 63, 2943 (1989).
4. M. N. Magomedov, Zh. Fiz. Khim. 61, 1003 (1987).
5. D. M. Freïk, V. V. Prokopïv, M. O. Galushchak, M. V. Pits, and G. D. Mateïk, Crystal Chemistry and Thermodynamics of Atomic Defects in IV–VI Compounds (Plai, Ivano-Frankivsk, Ukraine, 1999) [in Ukrainian].