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Rudchenko, V. F.; Shtamburg, V. G.; Pleshkova, A. P.; Kostyanovskii, R. G.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 5 p. 825 - 829
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 5 p. 1065 - 1069