Tolstikov, G. A.; Spivak, A. Yu.; Khalilov, L. M. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1984 , vol. 33, # 6 p. 1328 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1984 , # 6 p. 1439