@article{DE_1973_9_2_a4,
     author = {I. G. Egorov},
     title = {Stability in the large of the zero solution of a certain system of two differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {241--250},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_2_a4/}
}