TY - JOUR AU - A. A. Tret'yakov TI - The~implicit function theorem in degenerate problems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 179 EP - 180 VL - 42 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1987_42_5_a15/ LA - en ID - RM_1987_42_5_a15 ER -