Numerical Investigation of the Dynamical Behavior of Hepatitis B Virus via Caputo-Fabrizio Fractional Derivative. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5509, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5509. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5509. Acesso em: 6 feb. 2025.