%0 Journal Article %A A. Yu. Popov %T Extremal problems in the~theory of analytic continuation %J Sbornik. Mathematics %D 1999 %P 737-761 %V 190 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1999_190_5_a3/ %G en %F SM_1999_190_5_a3