@article{DE_1987_23_2_a7,
     author = {Yu. S. Ledyaev and E. F. Mishchenko},
     title = {Conditions for the optimality of strategies in differential games of fixed duration},
     journal = {Differencialʹnye uravneni\^a},
     pages = {244--255},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_2_a7/}
}