%0 Journal Article %A J. V. Rybalov %T Imbedding theorems for functions which are defined in unbounded regions, and their application to the spectral theory of elliptic selfadjoint operators %J Doklady Akademii Nauk %D 1969 %P 1041-1043 %V 184 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_184_5_a5/ %G ru %F DAN_1969_184_5_a5