@article{DE_1976_12_8_a1,
     author = {V. V. Al'sevich},
     title = {Necessary optimality conditions for minimax optimization problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1384--1391},
     year = {1976},
     volume = {12},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_8_a1/}
}