@article{DE_1970_6_7_a7,
     author = {I. V. Gaishun},
     title = {A certain application of qualitative methods in the theory of the stability of nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1211--1220},
     publisher = {mathdoc},
     volume = {6},
     number = {7},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_7_a7/}
}