@article{TM_1972_128_a1,
     author = {N. N. Krasovskii and A. I. Subbotin},
     title = {The saddle point of a positional differential game},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {22--33},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1972_128_a1/}
}