Prishchenko, A. A.; Livantsov, M. V.; Petrosyan, V. S.
Russian Journal of General Chemistry, 1993 , vol. 63, # 8.2. p. 1326 - 1327
Zhurnal Obshchei Khimii, 1993 , vol. 63, # 8 p. 1902 - 1903