Grishchuk, B. D.; Gorbovoi, P. M.; Kudrik, E. Ya.; Ganushchak, N. I.
Russian Journal of General Chemistry, 1993 , vol. 63, # 10.2 p. 1620 - 1623
Zhurnal Obshchei Khimii, 1993 , vol. 63, # 10 p. 2335 - 2341