Zav'yalov, S. I.; Zavolin, A. G.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1982 , vol. 31, p. 1700 - 1703
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1982 , # 8 p. 1910 - 1913