@article{DAN_1969_188_2_a5,
     author = {Yu. P. Krivenkov},
     title = {A certain form of optimality conditions},
     journal = {Doklady Akademii Nauk},
     pages = {278--281},
     publisher = {mathdoc},
     volume = {188},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_2_a5/}
}