Salimgareeva, I. M.; Bogatova, N. G.; Panasenko, A. A.; Khalilov, L. M.; Purlei, I. I.; et al. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, p. 1456 - 1461 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , vol. 32, p. 1605 - 1612