1. 1. S. Motrya, Yu. Voroshilov, M. Potoriy et al. Ukr. Chem. J.52(1986) 807.
2. 2. Yu. Voroshilov, S. Motrya, E. Semrad. Ukr. Chem. J.60 (1994)128.
3. 3. I.D.Olekseyuk, V.V.Bozhko, O.V.Parasyuk, V.V.Halyan, I.I.Petrys'. Functional materials. 6, (1999) 550.
4. 4. Electron phenomena in chalcogenide glassy semiconductors.Nauka, Saint-Petersburg, 1996, 486 p.
5. 5. S. Abe, Yu. Toyozava. Density of the electron states and absorption edge in amorphous semiconductors. In: Amorphous semiconductors and devices based on them.Metallurgy,Moscow, 1986, 376 p.