1. K. Ramanathan, M. A. Contreras, C. I. Parkins, S. Asher, F. S. Hasoon, D. Young, M. Romero, R. Noufi, J. Ward, and A. Duba, Progr. Photovolt.: Res. Appl. 11, 225 (2003).
2. I. V. Bodnar’, E. S. Dmitrieva, V. Yu. Rud’, and Yu. V. Rud’, Zh. Tekh. Fiz. 75, 84 (2005) [Tech. Phys. 50, 367 (2005)].
3. I. V. Bodnar’, V. F. Gremenok, V. Yu. Rud’, and Yu. V. Rud’, Fiz. Tekh. Poluprovodn. 33, 805 (1999) [Semiconductors 33, 740 (1999)].
4. Physicochemical Properties of Semiconductor Substances, A Reference Book, Ed. by A. V. Novoselova and V. B. Lazarev (Nauka, Moscow, 1979) [in Russian].
5. N. Kh. Abrikosov, V. F. Bankina, L. V. Poretskaya, E. I. Skudnova, and S. N. Chizhevskaya, Semiconductor Chalcogenides and Alloys on their Basis (Nauka, Moscow, 1979) [in Russian].