Erashko, V. I.; Sazonova, O. M.; Tishaninova, A. A,; Fainzil'berg, A. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1982 , vol. 31, # 1 p. 152 - 156 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1982 , # 1 p. 161 - 165