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@article{DE_1971_7_12_a4, author = {B. Mordukhovich}, title = {On the problem of the existence of optimal controls}, journal = {Differencialʹnye uravneni\^a}, pages = {2161--2167}, publisher = {mathdoc}, volume = {7}, number = {12}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_12_a4/} }
B. Mordukhovich. On the problem of the existence of optimal controls. Differencialʹnye uravneniâ, Tome 7 (1971) no. 12, pp. 2161-2167. http://geodesic.mathdoc.fr/item/DE_1971_7_12_a4/