TY - JOUR AU - M. Ya. Spiridonov TI - Approximation of solutions of elliptic problems in domains with noncompact boundaries by solutions of exterior or interior problems JO - Sbornik. Mathematics PY - 1986 SP - 551 EP - 561 VL - 53 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1986_53_2_a15/ LA - en ID - SM_1986_53_2_a15 ER -