Sangotola, A. O., and S. B. Adeyemo. “A Study on Seiqr Mathematical Model With Vaccination and Preventive Control Efforts”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 8, no. 2 (January 22, 2023): 15 - 22. Accessed April 3, 2025. http://ijmso.unilag.edu.ng/article/view/1685.