%0 Journal Article %A L. D. Kudryavtsev %T Direct and inverse imbedding theorems. Applications to the solution of elliptic equations by variational methods %J Informatics and Automation %D 1959 %P 3-182 %V 55 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1959_55_a0/ %G ru %F TRSPY_1959_55_a0