EL-SHAHED, M.; ALHARBI, R. Optimal Control Strategies for Dual-Strain Hepatitis B Dynamics: A Mathematical and Cost-Effectiveness Study. Contemporary Mathematics , [S. l.], v. 6, n. 5, p. 5652–5690, 2025. DOI: 10.37256/cm.6520257666. Disponível em: https://ojs.wiserpub.com/index.php/CM/article/view/7666. Acesso em: 15 dec. 2025.