@article{DE_1974_10_10_a2,
     author = {V. G. Boltyanskii},
     title = {The maximum principle and the support principle in minimax problems of optimization},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1759--1771},
     publisher = {mathdoc},
     volume = {10},
     number = {10},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_10_a2/}
}