Mathematical analysis of a symptom-structured epidemic model . Selecciones Matemáticas, [S. l.], v. 8, n. 02, p. 295–315, 2021. DOI: 10.17268/sel.mat.2021.02.07. Disponível em: https://revistas.unitru.edu.pe/index.php/SSMM/article/view/3902. Acesso em: 18 jul. 2026.