Glukhovtsev, V. G.; Il'in, Yu. V.; Ignatenko, A. V.; Brezhnev, L. Yu. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 12 p. 2631 - 2633 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 12 p. 2834 - 2837