PDF(372 KB)
On the Distribution and Number of Limit Cycles for Quadratic System with Two Foci
Ping Guang ZHANG
Acta Mathematica Sinica, Chinese Series ›› 2001, Vol. 44 ›› Issue (1) : 37-44.
PDF(372 KB)
PDF(372 KB)
On the Distribution and Number of Limit Cycles for Quadratic System with Two Foci
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