1. Sh. A. Mirsagatov, B. U. Aitbaev, and V. M. Rubinov, Semiconductors 30, 301 (1996).
2. Sh. A. Mirsagatov, A. S. Achilov, B. N. Zaveryukhin, and M. S. Baiev, Russ. Phys. J. 55, 180 (2012).
3. Sh. A. Mirsagatov, O. K. Ataboev, and K. A. Ismoilov, in Proceedings of the 4th International Scientific-Practical Conference on Structural Relaxation in Solids (Vinnitsa, 2012), p. 236.
4. S. A. Muzaffarova, B. U. Aitbaev, Sh. A. Mirsagatov, K. Durshimbetov, and Zh. Zhanabergenov, Semiconductors 42, 1377 (2008).
5. S. M. Frish, in Optical Methods of Measurement (Leningr. Gos. Univ., Leningrad, 1976), pt. 1, p. 26 [in Russian].