Agafonov, N. E.; Kondrat'eva, G. Ya. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, # 7 p. 1474 - 1477 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 7 p. 1612 - 1615