Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1991_27_10_a19, author = {V. V. Amel'kin}, title = {Differential systems with common trajectories}, journal = {Differencialʹnye uravneni\^a}, pages = {1813--1814}, publisher = {mathdoc}, volume = {27}, number = {10}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a19/} }
V. V. Amel'kin. Differential systems with common trajectories. Differencialʹnye uravneniâ, Tome 27 (1991) no. 10, pp. 1813-1814. http://geodesic.mathdoc.fr/item/DE_1991_27_10_a19/