Terent'ev, A. B.; Makaeva, R. M.; Musavirov, R. S. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 10 p. 2153 - 2155 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 10 p. 2351 - 2353