Vasil'eva, T. P.; Bystrova, V. M.; Lin'kova, M. G.; Kil'disheva, O. V.; Knunyants, I. L. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 8 p. 1519 - 1524 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , vol. 30, # 8 p. 1850 - 1856