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Ogurtsov, V. A.; Rakitin, O. A.; Obruchnikova, N. V.; Chertanova, L. F.; Gazikasheva, A. A.; Khmel'nitskii, L. T.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1990 , vol. 39, # 9.2. p. 1896 - 1900
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1990 , vol. 39, # 9 p. 2084 - 2089