@article{DE_1972_8_10_a22,
     author = {N. I. Krupnova},
     title = {On the question of the stability of the solutions of linear systems of differential equations with lag},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1889--1891},
     publisher = {mathdoc},
     volume = {8},
     number = {10},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_10_a22/}
}