%0 Journal Article %A K. Yu. Osipenko %T Heins' problem and optimal extrapolation of analytic functions prescribed with an error %J Sbornik. Mathematics %D 1986 %P 551-559 %V 54 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1986_54_2_a13/ %G en %F SM_1986_54_2_a13