Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_12_a10, author = {N. N. Petrov}, title = {Local controllability}, journal = {Differencialʹnye uravneni\^a}, pages = {2214--2222}, publisher = {mathdoc}, volume = {12}, number = {12}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_12_a10/} }
N. N. Petrov. Local controllability. Differencialʹnye uravneniâ, Tome 12 (1976) no. 12, pp. 2214-2222. http://geodesic.mathdoc.fr/item/DE_1976_12_12_a10/