Rogovik, V. M.; Delyagina, N. I.; Mysov, E. I.; Cherstkov, V. F.; Sterlin, S. R.; German, L. S.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1990 , vol. 39, # 9.1. p. 1870 - 1876
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1990 , # 9 p. 2057 - 2063