Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1968_4_4_a2, author = {N. N. Petrov}, title = {Controllability of autonomous systems}, journal = {Differencialʹnye uravneni\^a}, pages = {606--617}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_4_a2/} }
N. N. Petrov. Controllability of autonomous systems. Differencialʹnye uravneniâ, Tome 4 (1968) no. 4, pp. 606-617. http://geodesic.mathdoc.fr/item/DE_1968_4_4_a2/