TY - JOUR AU - M. I. Vishik AU - V. V. Grushin TI - Boundary value problems for elliptic equations degenerate on the boundary of a domain JO - Sbornik. Mathematics PY - 1969 SP - 423 EP - 454 VL - 9 IS - 4 UR - http://geodesic.mathdoc.fr/item/SM_1969_9_4_a0/ LA - en ID - SM_1969_9_4_a0 ER -