@article{DE_1980_16_2_a0,
     author = {M. Yu. Bogdanova},
     title = {A criterion for the instability of the zero solution of a stationary differential system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {195--200},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_2_a0/}
}