LAWAL, O. F.; YUSUF, T. T.; ABIDEMI , A. . On the efficiency of optimal vaccination, environmental sanitation and treatment controls for typhoid fever: a mathematical study approach. Journal of Mathematical Analysis and Modeling, [S. l.], v. 6, n. 1, p. 15–34, 2025. DOI: 10.48185/jmam.v6i1.1226. Disponível em: https://www.sabapub.com/index.php/jmam/article/view/1226. Acesso em: 25 may. 2026.