1. M. A. Porai-Koshits and E. A. Gilinskaya, Itogi Nauki Tekh., Ser. Kristallokhim. 1, 1 (1966).
2. M. A. Porai-Koshits and L. O. Atovmyan, Koord. Khim. 1, 1271 (1975).
3. F. Giffith and C. Wicing, J. Chem. Soc. A, No. 3, 379 (1968).
4. M. A. Porai-Koschits, Izv. Jugosl. Crystallogr. Centr. 9, 19 (1974).
5. M. A. Porai-Koshits and L. O. Atovmyan, Crystal Chemistry of Molybdenum Coordination Compounds (Nauka, Moscow, 1974) [in Russian].