TY - JOUR AU - B. Mordukhovich TI - Metric approximations and necessary optimality conditions for general classes of nonsmooth extremal problems JO - Doklady Akademii Nauk PY - 1980 SP - 1072 EP - 1076 VL - 254 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1980_254_5_a11/ LA - ru ID - DAN_1980_254_5_a11 ER -