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@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/} }
E. V. Voskresenskii. Asymptotic equilibrium, periodic solutions, and Lyapunov's direct method. Differencialʹnye uravneniâ, Tome 35 (1999) no. 6, pp. 729-732. http://geodesic.mathdoc.fr/item/DE_1999_35_6_a1/