TY - JOUR AU - B. Sh. Mordukhovich TI - Penalty functions and necessary conditions for an~extremum in non-smooth and non-convex optimization problems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1981 SP - 242 EP - 243 VL - 36 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1981_36_1_a14/ LA - en ID - RM_1981_36_1_a14 ER -