@article{DE_1977_13_5_a19,
     author = {N. N. Ladis},
     title = {Topological equivalence of nonautonomous equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {951--953},
     year = {1977},
     volume = {13},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_5_a19/}
}