Fractional-Order Analysis of HTLV, HPV, and HIV Co-Infection Dynamics. Contemporary Mathematics , [S. l.], v. 6, n. 6, p. 8089–8127, 2025. DOI: 10.37256/cm.6620257839. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/7839. Acesso em: 24 dec. 2025.