Lawal OF, Yusuf TT, Abidemi A. On the efficiency of optimal vaccination, environmental sanitation and treatment controls for typhoid fever: a mathematical study approach. J. Math. Anal. Model. [Internet]. 2025 Jun. 16 [cited 2026 Apr. 19];6(1):15-34. Available from: https://sabapub.com/index.php/jmam/article/view/1226