Moiseenkov, A. M.; Dragan, V. A.; Lozanova, A. V.; Veselovskii, V. V. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1988 , vol. 37, p. 1603 - 1609 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1988 , # 8 p. 1797 - 1803