%0 Journal Article %A S. E. Pastukhova %T On the error of averaging for the Steklov problem in a punctured domain %J Differencialʹnye uravneniâ %D 1995 %P 1042-1054 %V 31 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_6_a14/ %G ru %F DE_1995_31_6_a14