@article{DAN_1972_203_3_a3,
     author = {N. N. Krasovskii},
     title = {Extremal control in a nonlinear positional differential game},
     journal = {Doklady Akademii Nauk},
     pages = {520--523},
     publisher = {mathdoc},
     volume = {203},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_203_3_a3/}
}