Zav'yalov, S. I.; Ezhova, G. I.; Sitkareva, I. V.; Dorofeeva, O. V.; Zavozin, A. G.; Rumyantseva, E. E. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 10 p. 2204 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , # 10 p. 2392 - 2393