Nonlinear SEIS Epidemic Dynamics with Fractional-Order Time: Analytical and Numerical Results. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 7, n. 2, p. 583–601, 2025. DOI: 10.12150/jnma.2025.583. Disponível em: https://www.global-sci.com/index.php/jnma/article/view/13821. Acesso em: 6 dec. 2025.