Igumnov, S. M.; Delyagina, N. I.; Knunyants, I. L.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 10 p. 1924 - 1927
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 10 p. 2339 - 2342

Ishikawa, Nobuo; Iwamoto, Kazuhiko; Ishiwata, Tatsumi; Kitazume, Tomoya
Bulletin of the Chemical Society of Japan, 1982 , vol. 55, # 9 p. 2956 - 2958