@article{DE_1979_15_6_a7,
     author = {A. A. Shestakov and Yu. N. Merenkov},
     title = {Examples of {Ljapunov} unstable points of positive attraction},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1028--1035},
     publisher = {mathdoc},
     volume = {15},
     number = {6},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_6_a7/}
}