Sadykov, A. S.; Otargaliev, T. O.; Ishbaev, A. I.; Abduvakhabov, A. A.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 11 p. 2332 - 2337
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 11 p. 2592 - 2599