Abebaw , Y. F. ., and T. T. . Mekonnen. “Spread and Control of the Dynamics of HIV/AIDS-TB Co-Infection in Ethiopia: A Mathematical Model Analysis”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 55, no. 2, Feb. 2021, pp. 11-34, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/12253.