@article{DE_1980_16_5_a3,
     author = {Yu. V. Malyshev},
     title = {Stability of sets for nonautonomous systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {818--826},
     year = {1980},
     volume = {16},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_5_a3/}
}