@article{DE_1979_15_2_a7,
     author = {G. S. Osipenko},
     title = {The behavior of the solutions of differential equations near invariant manifolds},
     journal = {Differencialʹnye uravneni\^a},
     pages = {262--271},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_2_a7/}
}