@article{TIMM_2015_21_2_a6,
     author = {V. A. Dykhta},
     title = {Positional strengthenings of the maximum principle and sufficient optimality conditions},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {73--86},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2015_21_2_a6/}
}