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JOURNALS
// Differentsial'nye Uravneniya
// Archive
Differ. Uravn.,
1973
Volume 9,
Number 4,
Pages
650–659
(Mi de1867)
Ordinary Differential Equations
The problem of distinguishing the center and the focus
A. P. Sadovskii
V. I. Lenin Belorusskii State University
UDC:
517.925.11
Received:
18.04.1972
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Steklov Math. Inst. of RAS
, 2024
Fulltext:
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