@article{DE_1988_24_6_a31,
     author = {Ch. A. Skhalyaho},
     title = {Zeros of the solutions of a two-dimensional differential system on a finite interval},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1080--1083},
     publisher = {mathdoc},
     volume = {24},
     number = {6},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_6_a31/}
}