Different semi-analytical methods for solving a non-linear initial value problem of an epidemic model. Nonlinear Studies, [S. l.], v. 33, n. 1, p. 389–415, 2026. Disponível em: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/4157. Acesso em: 15 apr. 2026.