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@article{DE_1985_21_5_a20, author = {V. A. Vyazgin}, title = {On necessary and sufficient conditions for a maximin in control problems}, journal = {Differencialʹnye uravneni\^a}, pages = {888--890}, publisher = {mathdoc}, volume = {21}, number = {5}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_5_a20/} }
V. A. Vyazgin. On necessary and sufficient conditions for a maximin in control problems. Differencialʹnye uravneniâ, Tome 21 (1985) no. 5, pp. 888-890. http://geodesic.mathdoc.fr/item/DE_1985_21_5_a20/