TY - JOUR AU - L. D. Kudryavtsev TI - Direct and inverse imbedding theorems. Applications to the solution of elliptic equations by variational methods JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1959 SP - 3 EP - 182 VL - 55 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1959_55_a0/ LA - ru ID - TM_1959_55_a0 ER -