Govindan, Vediyappan, Selvam Arunachalam, Dumitru Baleanu, and Busayamas Pimpunchat. “Fractional-Order Analysis of HTLV, HPV, and HIV Co-Infection Dynamics”. Contemporary Mathematics 6, no. 6 (November 6, 2025): 8089–8127. Accessed January 1, 2026. https://ojs.wiserpub.com/index.php/CM/article/view/7839.