%0 Journal Article %A A. A. Gonchar %T The rate of rational approximation and the property of single-valuedness of an analytic function in the neighborhood of an isolated singular point %J Sbornik. Mathematics %D 1974 %P 254-270 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1974_23_2_a5/ %G en %F SM_1974_23_2_a5