Trofimov, B. A.; Mikhaleva, A. I.; Petrova, O. V.; Sigalov, M. V. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, # 5 p. 1111 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 5 p. 1211