Gusev, B. P.; El'perina, E. A.; Kucherov, V. F.; Pirozhkov, S. D.; Lapidus, A. L.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1980 , vol. 29, # 3 p. 421 - 425
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980 , # 3 p. 603 - 607