Mistryukov, E. A.; Korshevits, I. K. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 11 p. 2396 - 2397 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 11 p. 2612 - 2613