@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/}
}