@article{DE_1984_20_11_a6,
     author = {G. S. Osipenko},
     title = {Structural stability of systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1897--1906},
     year = {1984},
     volume = {20},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_11_a6/}
}