Bakum, S. I.; Kuznetsova, S. F.; Kuznetsov, N. T.
Russian Journal of Inorganic Chemistry (Translation of Zhurnal Neorganicheskoi Khimii), 1994 , vol. 39, p. 549 - 550
Zhurnal Neorganicheskoi Khimii, 1994 , vol. 39, p. 576 - 577