@article{DE_1969_5_2_a19,
     author = {N. T. Primachuk},
     title = {Stability of the solutions of nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {389--392},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_2_a19/}
}