Luk'yanov, O. A.; Mel'nikova, T. G.; Tartakovskii, V. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 10 p. 1920 - 1923 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 10 p. 2335 - 2339