Snegirev, V. F.; Makarov, K. N. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 1 p. 91 - 103 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 1 p. 106 - 119