@article{DE_1990_26_2_a20,
     author = {V. V. Basov},
     title = {On the divergence of transformations in the averaging method},
     journal = {Differencialʹnye uravneni\^a},
     pages = {343--345},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_2_a20/}
}