%0 Journal Article %A K. V. Runovskii %T On approximation ``by an angle'' in $L_p$ spaces, $0 %J Doklady Akademii Nauk %D 1992 %P 45-47 %V 322 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_322_1_a8/ %G ru %F DAN_1992_322_1_a8