1. Kyazymzade, A.G., Guliev, A.O., Tagirov, V.V.: Fiz. Tekh. Poluprovod.15, 173 (1981)
2. Dzhafarov, T.D., Mekhtiev, A.Sh., Sadigov, M.S.: Phys. Status Solidi (A)69, 643 (1982)
3. Giulio, M.D., Micocci, G., Rizzo, A., Tepore, A.: J. Appl. Phys.54, 5839 (1983)
4. Kurbatov, L.N., Balychenko, A.A., Bakumenko, V.L., Morozov, V.A., Chishko, V.F., Makhidzhanov, S.S.: Zh. Tek, Fiz. Pis. Red.4, 1110 (1978)
5. Shigetomi, S., Ikari, T., Koga, Y., Shigetomi, S.: Jpn. J. Appl. Phys.27, 1271 (1988)