@article{DE_1969_5_5_a5,
     author = {M. M. Khapaev},
     title = {The stability of the state of equilibrium of systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {848--855},
     publisher = {mathdoc},
     volume = {5},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_5_a5/}
}