Odinets, I. L.; Antonov, E. A.; Petrovsky, P. V.; Morozik, Yu. I.; Krivolapov, Yu. A.; et al. Russian Chemical Bulletin, 1993 , vol. 42, # 1 p. 154 - 161 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1993 , # 1 p. 170 - 177