@article{DE_1983_19_5_a21,
     author = {Ya. Futak},
     title = {Asymptotic equivalence of systems of ordinary differential equations and systems of differential equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {911--914},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_5_a21/}
}