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@article{DE_1969_5_4_a7, author = {S. K. Persidskii}, title = {Some theorems on {Ljapunov's} second method}, journal = {Differencialʹnye uravneni\^a}, pages = {678--687}, publisher = {mathdoc}, volume = {5}, number = {4}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_4_a7/} }
S. K. Persidskii. Some theorems on Ljapunov's second method. Differencialʹnye uravneniâ, Tome 5 (1969) no. 4, pp. 678-687. http://geodesic.mathdoc.fr/item/DE_1969_5_4_a7/