Near-Invariant Tori on Exponentially Long Time for Poisson systems. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 1, n. 3, p. 385–395, 2024. DOI: 10.12150/jnma.2019.385. Disponível em: https://gsp.tricubic.dev/jnma/article/view/13530. Acesso em: 14 mar. 2026.