%0 Journal Article %A A. A. Ligun %T Sharp constants in inequalities of Jackson type %J Doklady Akademii Nauk %D 1985 %P 34-38 %V 283 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1985_283_1_a6/ %G ru %F DAN_1985_283_1_a6