Khan, Ihsan Ullah, Muhammad Irfan, Azhar Iqbal, and Amjid Hussain. “Transmission Analysis of Hepatitis B Epidemic Model Using Standard and Non-Standard Schemes”. Scientific Inquiry and Review 7, no. 1 (March 15, 2023): 53-70. Accessed September 16, 2024. https://journals.umt.edu.pk/index.php/SIR/article/view/3591.