Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1991_27_5_a5, author = {A. A. Liverovskiy and N. N. Petrov}, title = {Some differential-topological problems in control theory}, journal = {Differencialʹnye uravneni\^a}, pages = {771--777}, publisher = {mathdoc}, volume = {27}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a5/} }
A. A. Liverovskiy; N. N. Petrov. Some differential-topological problems in control theory. Differencialʹnye uravneniâ, Tome 27 (1991) no. 5, pp. 771-777. http://geodesic.mathdoc.fr/item/DE_1991_27_5_a5/