NWASUKA*, S. .; OSISIOGU, U. .; EFOR, T. . Mathematical model for controllability of covid-19 investigating the impact of protective measures, for optimal solution to lower the disease burden in Nigeria. International Journal of Mathematical Analysis and Modelling, [S. l.], v. 7, n. 2, 2025. Disponível em: https://tnsmb.org/journal/index.php/ijmam/article/view/198. Acesso em: 28 jul. 2026.