TY - JOUR AU - O. A. Ladyzhenskaya AU - N. N. Ural'tseva TI - Quasi-linear elliptic equations and variational problems with many independent variables JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1961 SP - 17 EP - 91 VL - 16 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1961_16_1_a1/ LA - en ID - RM_1961_16_1_a1 ER -