%0 Journal Article %A A. V. Lapitskii %A L. G. Vlasov %A V. I. Bezrukov %T The production of heteroniobates of some transition metals %J Doklady Akademii Nauk %D 1964 %P 868-870 %V 154 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_154_4_a27/ %G ru %F DAN_1964_154_4_a27