@article{DE_2005_41_3_a6,
     author = {Yu. Yu. Bagderina and R. K. Gazizov},
     title = {Approximately {Invariant} {Solutions} of {Differential} {Equations} with a {Small} {Parameter}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {347--355},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_3_a6/}
}