ULLAH, Roman; ZAMAN, Gul; ISLAM, Saeed. Stability analysis of a general SIR epidemic model. VFAST Transactions on Mathematics, [S. l.], v. 1, n. 1, p. 16–20, 2013. DOI: 10.21015/vtm.v1i1.41. Disponível em: https://vfast.org/journals/index.php/VTM/article/view/41. Acesso em: 24 apr. 2026.