A fractional-order epidemic model with vaccination and hospitalization: Dynamics and actuarial applications. Nonlinear Studies, [S. l.], v. 33, n. 2, p. 447–502, 2026. Disponível em: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/4282. Acesso em: 14 jul. 2026.