@article{DE_1990_26_6_a17,
     author = {I. E. Vitrichenko and T. Yu. Zanun},
     title = {On the center of attraction of a quasilinear nonautonomous system in a critical case},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1081--1084},
     publisher = {mathdoc},
     volume = {26},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_6_a17/}
}