New Proofs of Monotonicity of Period Function for Cubic Elliptic Hamiltonian. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 1, n. 3, p. 301–305, 2024. DOI: 10.12150/jnma.2019.301. Disponível em: https://gsp.tricubic.dev/jnma/article/view/13524. Acesso em: 14 mar. 2026.