“A Mathematical Model for the Transmission Dynamics of COVID-19 Pandemic Considering Protected and Hospitalized With Optimal Control”. East African Journal of Biophysical and Computational Sciences 5, no. 2 (February 7, 2025): 58–86. Accessed August 31, 2025. https://journals.hu.edu.et/hu-journals/index.php/eajbcs/article/view/694.