PDF(168 KB)
On the Existence of Periodic Solutions for a Nonlinear System of Ordinary Differential Equations
Zhaoli Liu
Acta Mathematica Sinica ›› 2000, Vol. 16 ›› Issue (3) : 505-514.
PDF(168 KB)
PDF(168 KB)
On the Existence of Periodic Solutions for a Nonlinear System of Ordinary Differential Equations
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