Shereshovets, V. V.; Korotaeva, N. M.; Vorob'ev, A. S.; Komissarov, V. D.; Furlei, I. I. Russian Chemical Bulletin, 1994 , vol. 43, # 9 p. 1479 - 1483 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1994 , # 9 p. 1567 - 1571