On the number of limit cycles in the neighborhood of a singular point
Differencialʹnye uravneniâ, Tome 1 (1965) no. 1, pp. 53-66
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@article{DE_1965_1_1_a6,
author = {K. S. Sibirskii},
title = {On the number of limit cycles in the neighborhood of a singular point},
journal = {Differencialʹnye uravneni\^a},
pages = {53--66},
year = {1965},
volume = {1},
number = {1},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DE_1965_1_1_a6/}
}
K. S. Sibirskii. On the number of limit cycles in the neighborhood of a singular point. Differencialʹnye uravneniâ, Tome 1 (1965) no. 1, pp. 53-66. http://geodesic.mathdoc.fr/item/DE_1965_1_1_a6/