An SIRS Epidemic Model with Pulse Vaccination, Birth Pulse and Logistic Death Rate. Communications in Mathematical Research, [S. l.], v. 35, n. 3, p. 247–263, 2019. DOI: 10.13447/j.1674-5647.2019.03.06. Disponível em: https://www.global-sci.com/index.php/cmr/article/view/9006. Acesso em: 27 feb. 2026.