1. G. L. Mironchuk, G. E. Davidyuk, V. V. Bozhko, and V. Kazhukauskas, Fiz. Tekh. Poluprovodn. 44, 694 (2010) [Semiconductors 44, 667 (2010)].
2. G. E. Davidyuk, A. G. Kevshyn, V. V. Bozhko, and V. V. Halyan, Fiz. Tekh. Poluprovodn. 43, 1441 (2009) [Semiconductors 43, 1401 (2009)].
3. G. E. Davidyuk, V. V. Bozhko, and L. V. Bulatetskaya, Fiz. Tekh. Poluprovodn. 42, 1263 (2008) [Semiconductors 42, 1244 (2008)].
4. G. E. Davidyuk, V. V. Bozhko, G. L. Mironchuk, and V. Z. Pankevich, Fiz. Tverd. Tela 49, 2133 (2007) [Phys. Solid State 49, 2238 (2007)].
5. A. G. Rokakh, Pis’ma Zh. Tekh. Fiz. 10(13), 820 (1984) [Sov. Tech. Phys. Lett. 10, 344 (1984)].