Zakharova, I. A.; Kurbakova, A. P.; Ivanova, N. A.; Lokshin, B. V.; Prokof'ev, A. I. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1985 , vol. 34, p. 1963 - 1969 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1985 , # 9 p. 2124 - 2131