Dzhemilev, U. M.; Ibragimov, A. G.; Vostrikova, O. S.; Tolstikov, G. A.; Zelenova, L. M.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 2 p. 281 - 284
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 2 p. 361 - 364