@article{DE_1967_3_5_a9,
     author = {G. S. Krechetov},
     title = {Asymptotic stability of the zero solution of a non-autonomous system of two differential equations. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {796--810},
     publisher = {mathdoc},
     volume = {3},
     number = {5},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_5_a9/}
}