@article{DE_1991_27_5_a1,
     author = {E. V. Voskresenskii},
     title = {Asymptotic behavior of solutions of differential equations with functional perturbation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {745--751},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a1/}
}