The analysis of hepatitis B virus (HBV) transmission using an epidemic model. Natural and Applied Sciences International Journal (NASIJ), Peshawar, Pakistan, v. 2, n. 1, p. 70–79, 2021. DOI: 10.47264/idea.nasij/2.1.6. Disponível em: https://www.ideapublishers.org/index.php/nasij/article/view/588. Acesso em: 24 apr. 2026.