%0 Journal Article %A A. A. Pekarskii %T Direct and converse theorems of rational approximation in the spaces $L_p[-1,1]$ and $C[-1,1]$ %J Doklady Akademii Nauk %D 1987 %P 1307-1310 %V 293 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a5/ %G ru %F DAN_1987_293_6_a5