@article{DE_1991_27_6_a1,
     author = {M. Baybazarov and V. N. Ushakov},
     title = {On the existence of the cost of differential games with integral constraints},
     journal = {Differencialʹnye uravneni\^a},
     pages = {931--941},
     publisher = {mathdoc},
     volume = {27},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_6_a1/}
}