Govindan, Vediyappan, Selvam Arunachalam, Dumitru Baleanu, and Busayamas Pimpunchat. 2025. “Fractional-Order Analysis of HTLV, HPV, and HIV Co-Infection Dynamics”. Contemporary Mathematics 6 (6):8089-8127. https://doi.org/10.37256/cm.6620257839.