Grishchuk, B. D.; Kudrik, E. Ya.; Gorbovoi, P. M.; Garmider, V. L.; Ganushchak, N. I.
Russian Journal of General Chemistry, 1994 , vol. 64, # 8.1 p. 1164 - 1166
Zhurnal Obshchei Khimii, 1994 , vol. 64, # 8 p. 1294 - 1297