Zav'yalov, S. I.; Zavozin, A. G.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 7 p. 1355 - 1357
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 7 p. 1666 - 1668