Kuznetsov, V. V.; Makhova, N. N.; Khmel'nitskii, L. I. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 2 p. 1924 - 1928 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , vol. 9, p. 2090 - 2094