@article{DE_1967_3_2_a6,
     author = {G. S. Krechetov},
     title = {Stability of the trivial solution of a non-autonomous system of two differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {232--243},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_2_a6/}
}