Gurmu, E., B. K. Bole, and P. R. Koya. “A Mathematical Modelling of HIV/AIDS Transmission Dynamics With Optimal Control Strategy”. International Journal Of Mathematics And Computer Research, Vol. 9, no. 4, Apr. 2021, pp. 2237-54, https://ijmcr.in/index.php/ijmcr/article/view/313.