@article{DE_1981_17_6_a4,
     author = {A. O. Sahakyan},
     title = {Absolute stability of integral manifolds},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1000--1006},
     publisher = {mathdoc},
     volume = {17},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_6_a4/}
}