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Existence of nonconstant periodic solutions for a class of second-order systems with p ( t ) $p(t)$ -Laplacian

Crossref DOI link: https://doi.org/10.1186/s13661-017-0901-y

Published Online: 2017-11-14

Published Print: 2017-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy