@article{DAN_1984_278_1_a4,
     author = {Yu. G. Evtushenko and V. A. Purtov},
     title = {Sufficient conditions for a minimum for nonlinear programming problems},
     journal = {Doklady Akademii Nauk},
     pages = {24--27},
     publisher = {mathdoc},
     volume = {278},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_278_1_a4/}
}