%0 Journal Article %A V. A. Kofanov %T Approximation in the mean of classes of differentiable functions by algebraic polynomials %J Doklady Akademii Nauk %D 1982 %P 1304-1306 %V 262 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_262_6_a4/ %G ru %F DAN_1982_262_6_a4