%0 Journal Article %A R. Ya. Doktorskii %T On the approximation of solutions of well-posed problems in unbounded domains for elliptic pseudodifferential operators %J Doklady Akademii Nauk %D 1976 %P 1303-1305 %V 229 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_229_6_a4/ %G ru %F DAN_1976_229_6_a4