@article{DE_1999_35_6_a1,
     author = {E. V. Voskresenskii},
     title = {Asymptotic equilibrium, periodic solutions, and {Lyapunov's} direct method},
     journal = {Differencialʹnye uravneni\^a},
     pages = {729--732},
     publisher = {mathdoc},
     volume = {35},
     number = {6},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_6_a1/}
}