Tatarinova, V. I.; Vasil'ev, A. A.; Petrosyan, V. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1990 , vol. 39, # 11 p. 2399 - 2401 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1990 , # 11 p. 2646 - 2648