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- [16] Infinitely many periodic solutions for a class of second-order Hamiltonian systems Acta Mathematicae Applicatae Sinica, English Series, 2016, 32 : 231 - 238
- [17] Infinitely Many Periodic Solutions for a Class of Second-order Hamiltonian Systems ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 2016, 32 (01): : 231 - 238