TY - JOUR AU - M. N. Feller TI - Infinite-dimensional elliptic equations and operators of L\'evy type JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1986 SP - 119 EP - 170 VL - 41 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1986_41_4_a2/ LA - en ID - RM_1986_41_4_a2 ER -