@article{DE_1989_25_9_a0,
     author = {N. D. Botkin},
     title = {Optimal universal strategy in a linear differential game},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1475--1480},
     year = {1989},
     volume = {25},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_9_a0/}
}