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"New existence and multiplicity theorems of periodic solutions for ..."
Xian Wu, Shaoxiong Chen, Fukun Zhao (2007)
- Xian Wu, Shaoxiong Chen, Fukun Zhao:
New existence and multiplicity theorems of periodic solutions for non-autonomous second order Hamiltonian systems. Math. Comput. Model. 46(3-4): 550-556 (2007)
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