%0 Journal Article %A K. Yu. Osipenko %T The Carath\'eodory--Fej\'er problem and optimal recovery of derivatives in Hardy spaces %J Sbornik. Mathematics %D 1995 %P 21-33 %V 81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1995_81_1_a1/ %G en %F SM_1995_81_1_a1