Infinitely many periodic solutions for subquadratic second-order Hamiltonian systems
2016 ◽
Vol 32
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pp. 231-238
2011 ◽
Vol 251
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pp. 816-833
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2017 ◽
Vol 64
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pp. 113-118
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2014 ◽
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Keyword(s):
2021 ◽
Vol 58
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pp. 103218
2014 ◽
Vol 13
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