Multiple Positive Periodic Solutions for Second-Order Differential Equations with a Singularity
Crossref DOI link: https://doi.org/10.1007/s10440-015-0030-5
Published Online: 2015-12-10
Published Print: 2016-08
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Tian, Desheng
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