@article{DE_1994_30_7_a7,
     author = {\`E. \`E. Shnol'},
     title = {On the stability of fixed points of two-dimensional mappings},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1156--1167},
     publisher = {mathdoc},
     volume = {30},
     number = {7},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_7_a7/}
}