Nizamov, I. S.; Kuznetsov, V. A.; Batyeva, E. S.; Al'fonsov, V. A.; Pudovik, A. N. Journal of General Chemistry USSR (English Translation), 1992 , vol. 62, p. 1366 - 1367 Zhurnal Obshchei Khimii, 1992 , vol. 62, p. 1665 - 1666