@article{DAN_1969_187_3_a5,
     author = {A. N. Berlinskii},
     title = {On the question of the structure of the vicinity of a singular point of a two-dimensional autonomous system},
     journal = {Doklady Akademii Nauk},
     pages = {502--505},
     publisher = {mathdoc},
     volume = {187},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_187_3_a5/}
}