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@article{DE_1985_21_3_a1, author = {A. I. Kalinin}, title = {On the problem of singular optimal controls}, journal = {Differencialʹnye uravneni\^a}, pages = {380--385}, publisher = {mathdoc}, volume = {21}, number = {3}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_3_a1/} }
A. I. Kalinin. On the problem of singular optimal controls. Differencialʹnye uravneniâ, Tome 21 (1985) no. 3, pp. 380-385. http://geodesic.mathdoc.fr/item/DE_1985_21_3_a1/