ONWUBUYA*, I. O. .; MADUBUEZE*, C. E. . SVEIR MODEL OF AN INFECTIOUS DISEASE AMONG INFECTED IMMIGRANTS WITH NONLINEAR INCIDENCE RATE. International Journal of Mathematical Analysis and Modelling, [S. l.], v. 4, 2023. Disponível em: https://tnsmb.org/journal/index.php/ijmam/article/view/22. Acesso em: 28 jul. 2026.