1. F. G. Bass and Yu. G. Gurevich, The Hot Electrons and Strong Electromagnetic Waves in Semiconductor Plasma and Gas Discharge (Nauka, Moscow, 1975) [in Russian].
2. A. I. Veinger, L. G. Paritssky, É. A. Akopyan, and G. Dadamirzaev, Fiz. Tekh. Poluprovodn. 9, 216 (1975) [Sov. Phys. Semicond. 9, 144 (1975)].
3. G. Gulyamov and S. Kh. Shamirzaev, Fiz. Tekh. Poluprovodn. 15, 1858 (1981) [Sov. Phys. Semicond. 15, 1082 (1981)].
4. N. A. Ablyazimova, A. I. Veinger, and V. S. Pitanov, Fiz. Tekh. Poluprovodn. 22, 2001 (1988) [Sov. Phys. Semicond. 22, 1267 (1988)].
5. G. Gulyamov and M. G. Dadamirzaev, Uzb. Fiz. Zh., No. 3, 48 (1998).