@article{DE_1973_9_3_a19,
     author = {V. M. Gershtein},
     title = {Centers of attraction of dynamical systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {553--555},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_3_a19/}
}