PDF(308 KB)
Periodic Solutions for a Class of Second Order Hamiltonian Systems
Ji Ming ZHENG, Di Xiang CHENG
Acta Mathematica Sinica, Chinese Series ›› 2010, Vol. 53 ›› Issue (4) : 721-726.
PDF(308 KB)
PDF(308 KB)
Periodic Solutions for a Class of Second Order Hamiltonian Systems
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