Nascimento, F.J.S.2026-11-032026-11-032026-09-17https://repositorio.univasf.edu.br/handle/123456789/1564https://creativecommons.org/licenses/by/4.0/Period functionMonotonicityPlanar Hamiltonian systemsSeparable HamiltoniansChicone’s criterionMonotonicity of the Period Function in Planar Separable Hamiltonian Systems: An Extension of Chicone’s CriterionArtigo de Periódicohttps://doi.org/10.1007/s12346-026-01595-wCIENCIAS EXATAS E DA TERRA