Koptenkova, V. A.; Veselovskii, V. V.; Novikova, M. A.; Moiseenkov, A. M. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 4 p. 743 - 747 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 4 p. 817 - 821