Titus, Rotich K, and Lagat C Robert. “The Bounds of Time Lag and Chemotherapeutic Efficacy in the Control of HIV/AIDS”. International Journal of Mathematical Research 3, no. 6 (September 24, 2014): 63–81. Accessed May 6, 2024. https://archive.conscientiabeam.com/index.php/24/article/view/2172.