1. Olekseyuk, I.D., Davidyuk, G., Bogdanyuk, N.S., et al., Preparation and Properties of Ag0.12Ga0.12Ge0.88Se2 Single Crystals, Neorg. Mater., 1993, vol. 29, no.5, pp. 617–619 [Inorg. Mater. (Engl. Transl.), vol. 29, no. 5, pp. 527–529].
2. Olekseyuk, I.D., Gulyak, A.V., Sysa, L.V., et al., Crystal Chemical Properties and Preparation of Single Crystals of AgGaSe2-GeSe2 γ-Solid Solutions, J. Alloys Compd., 1996, no. 241, pp. 187–190.
3. Badikov, V.V., Tropenko, N.K., Tyulyupa, A.G., and Shevyrdyaeva, G.S., Preparation of a New Nonlinear Material, Vsesoyuznaya konferentsiya po materialam dlya optoelektroniki (All-Union Conf. on Optoelectronic Materials), Uzhgorod, 1980, p. 56.
4. Badikov, V.V., Tyulyupa, A.G., Shevyrdyaeva, G.S., and Sheina, S.G., AgGaS2-GeS2 and AgGaSe2-GeSe2 Solid Solutions, Izv. Akad. Nauk SSSR, Neorg. Mater., 1991, vol. 27, no.2, pp. 248–252.
5. Bonch-Bruevich, V.L., Zvyagin, I.P., Kaiper, R., et al., Elektronnaya teoriya neuporyadochennykh poluprovodnikov (Electronic Theory of Disordered Semiconductors), Moscow: Nauka, 1981, pp. 11, 18, 305.