@article{DE_1988_24_3_a20,
     author = {B. V. Zadvornyi},
     title = {Application of {Lyapunov} functions to the investigation of the interval of existence of a solution},
     journal = {Differencialʹnye uravneni\^a},
     pages = {522--523},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_3_a20/}
}