%0 Journal Article %A M. Ya. Spiridonov %T Approximation of solutions of elliptic problems in domains with noncompact boundaries by solutions of exterior or interior problems %J Sbornik. Mathematics %D 1986 %P 551-561 %V 53 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1986_53_2_a15/ %G en %F SM_1986_53_2_a15