1. L. S. Smirnov, Fiz. Tekh. Poluprovodn. 35, 1029 (2001) [Semiconductors 35, 985 (2001)].
2. V. V. Kozlovskii, V. A. Kozlov, and V. N. Lomasov, Fiz. Tekh. Poluprovodn. 34, 129 (2000) [Semiconductors 34, 123 (2000)].
3. A. R. Chelyadinskii and F. F. Komarov, Usp. Fiz. Nauk 173, 813 (2003) [Phys. Usp. 46, 789 (2003)].
4. E. M. Zobov, M. E. Zobov, F. S. Gabibov, I. K. Kamilov, F. I. Manyakhin, and E. K. Naimi, Fiz. Tekh. Poluprovodn. 42, 282 (2008) [Semiconductors 42, 277 (2008)].
5. A. A. Podolyan and V. I. Khivrich, Pis’ma Zh. Tekh. Fiz. 31(10), 11 (2005) [Tech. Phys. Lett. 31, 408 (2005)].