1. Lyalikova, R. Yu., Mirovich, L. V.: Izv. Akad. Nauk SSSR, Neorg. Mater. 7 (1971) 1453; Inorg. Mater. (USSR) (English Transl.) 7 (1971) 1292.
2. Miller, A., Humphreys, R. G., Chapman, B.: J. Phys. (Paris) 36 (1975) C331.
3. Shay, T. L., Wernick, T. H.: "Ternary Chalcopyrite Semiconductors" Growth, Electronics, Properties and Applications. Pergamon, 1975.
4. Kozkina, I. I.: Vestn. Leningr. Univ. Fiz. Khim. 13 (1979) 83.
5. Bohmhammel, K., Deus, P., Schneider, H. A.: Phys. Status Solidi (a) 65 (1981) 563.