@article{DE_1991_27_9_a2,
     author = {V. I. Bakhtin},
     title = {Averaging in a single-frequency system in general position},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1493--1505},
     publisher = {mathdoc},
     volume = {27},
     number = {9},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_9_a2/}
}