1. Hery, Y.: CEA Centre d’Etudes Nucleaires de Fontenay-aux-Roses. Rep. CEA-R-4971, 1979. Reports of the Commisariat a l’Energie Atomique Service de Documentation, CEN-Saclay.
2. Zabel, M., Wandinger, S., Range, K.-J.: Z. Naturforsch. B34 (1979) 238.
3. El-Boragy, M., Schubert, K.: Z. Metallkd. 62 (1971) 314.
4. Patrie, M., Guittard, M., Pardo, M.-P.: Bull. Soc. Chim. Fr. 1969, p. 3832.
5. Nasibov, I.O., Sultanov, T.I., Rustamov, A.G., Rustamov, P.G., Shafagatova, G.G.: Izv. Akad. Nauk SSSR, Neorg. Mater. 15 (1979) 1535, Inorg. Mater. (USSR) (English Transl.) 15 (1979) 1209.