@article{DE_1991_27_9_a8,
     author = {I. G. Egorov},
     title = {On the stability in the large of the zero solution of a system of two differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1544--1550},
     publisher = {mathdoc},
     volume = {27},
     number = {9},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_9_a8/}
}