@article{DE_1973_9_7_a6,
     author = {N. N. Ladis},
     title = {Topological equivalence of linear flows},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1222--1235},
     year = {1973},
     volume = {9},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_7_a6/}
}