@article{DAN_1976_231_5_a2,
     author = {V. I. Blagodatskikh},
     title = {On the theory of sufficient conditions for optimality},
     journal = {Doklady Akademii Nauk},
     pages = {1041--1044},
     publisher = {mathdoc},
     volume = {231},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_5_a2/}
}