@article{MZM_1974_16_1_a8,
     author = {B. V. Aleshin},
     title = {Averaging in systems containing several small parameters},
     journal = {Matemati\v{c}eskie zametki},
     pages = {75--82},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_1_a8/}
}