Dzhemilev, U. M.; Kunakova, R. V.; Gaisin, R. L.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 10 p. 2107 - 2114
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 10 p. 2337 - 2346