%0 Journal Article %A M. I. Levin %A Yu. M. Girshovich %A V. K. Arro %T Best quadrature formulas on sets of functions %J Doklady Akademii Nauk %D 1976 %P 51-54 %V 226 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_226_1_a11/ %G ru %F DAN_1976_226_1_a11