Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1981_17_4_a8, author = {I. V. Polesya}, title = {Invariant sets of autonomous differential systems}, journal = {Differencialʹnye uravneni\^a}, pages = {643--650}, publisher = {mathdoc}, volume = {17}, number = {4}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1981_17_4_a8/} }
I. V. Polesya. Invariant sets of autonomous differential systems. Differencialʹnye uravneniâ, Tome 17 (1981) no. 4, pp. 643-650. http://geodesic.mathdoc.fr/item/DE_1981_17_4_a8/