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Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, # 6 p. 1334
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 6 p. 1455

Fokin,A.V. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1974 , vol. 23, p. 441 - 444
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1974 , vol. 23, p. 471 - 474