Solving Fractional Differential Equations in b-metric Spaces Tailored with a Directed Graph. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 4, p. 6811, 2025. DOI: 10.29020/nybg.ejpam.v18i4.6811. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/6811. Acesso em: 5 dec. 2025.