Kulikov, S. M.; Kozhevnikov, I. V.; Fomina, M. N.; Krysin, A. P.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 4 p. 681 - 684
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 4 p. 752 - 756