%0 Journal Article %A S. I. Fedorov %T On a~variational problem of Chebotarev in the theory of capacity of plane sets and covering theorems for univalent conformal mappings %J Sbornik. Mathematics %D 1985 %P 115-133 %V 52 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1985_52_1_a6/ %G en %F SM_1985_52_1_a6