Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1976_12_11_a14, author = {V. A. Tyshkevich}, title = {Asymptotic equivalence of linear differential systems with retarded argument}, journal = {Differencialʹnye uravneni\^a}, pages = {2039--2043}, publisher = {mathdoc}, volume = {12}, number = {11}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_11_a14/} }
V. A. Tyshkevich. Asymptotic equivalence of linear differential systems with retarded argument. Differencialʹnye uravneniâ, Tome 12 (1976) no. 11, pp. 2039-2043. http://geodesic.mathdoc.fr/item/DE_1976_12_11_a14/