@article{SM_1984_47_2_a14,
     author = {A. G. Kolpakov},
     title = {Averaging of some systems of ordinary differential equations},
     journal = {Sbornik. Mathematics},
     pages = {527--540},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_47_2_a14/}
}