Mamo, T. T. ., and T. T. . Mekonnen. “An Age Structure Mathematical Model Analysis on the Dynamics of Chronic and Hyper Toxic Forms of Hepatitis B Virus by SVEA_1 A_2 CR Model With Vaccination Intervention Control Strategy in Ethiopia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 50, no. 1, Mar. 2020, pp. 106-3, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/10714.