Yaro, D., S. W. Akuamoah, S. A. . Gyamerah, F. . Mahama, and E. Asabre. “Caputo Fractional Order Nonlinear Incidence HIV Infection Model With Optimal Control”. Contemporary Mathematics, vol. 5, no. 4, Dec. 2024, pp. 5828-46, doi:10.37256/cm.5420245562.