@article{DE_1981_17_9_a5,
     author = {V. G. Zadorozhniy},
     title = {On the question of conditions for the applicability of the averaging method},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1589--1595},
     publisher = {mathdoc},
     volume = {17},
     number = {9},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_9_a5/}
}