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The center conditions for a perturbed cubic center via the fourth-order Melnikov function
Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat. (2022) 116:189
https://doi.org/10.1007/s13398-022-01333-2
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Year:
2022
Month/Season:
October
Year:
2022