Krasnaya, Zh. A.; Prokof'ev, E. P.; Kucherov, V. F. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1980 , vol. 29, # 6 p. 987 - 990 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980 , # 6 p. 1373 - 1376