%0 Journal Article %A A. P. Bulanov %T The best rational approximations of convex functions and functions of finite variation %J Doklady Akademii Nauk %D 1970 %P 13-14 %V 190 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_190_1_a1/ %G ru %F DAN_1970_190_1_a1