Tolstikov, G. A.; Spivak, A. Yu.; Kuchin, A. V.; Lomakina, S. I. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 5 p. 1035 - 1040 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 5 p. 1146 - 1151