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@article{DE_1991_27_9_a0, author = {S. A. Aisagaliev}, title = {Controllability of a system of differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1475--1486}, publisher = {mathdoc}, volume = {27}, number = {9}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_9_a0/} }
S. A. Aisagaliev. Controllability of a system of differential equations. Differencialʹnye uravneniâ, Tome 27 (1991) no. 9, pp. 1475-1486. http://geodesic.mathdoc.fr/item/DE_1991_27_9_a0/