Existence of Solutions to a Class of Fractional Differential Equations. Journal of Nonlinear Modeling and Analysis, [S. l.], v. 4, n. 3, p. 409–442, 2024. DOI: 10.12150/jnma.2022.409. Disponível em: https://global-sci.com/index.php/jnma/article/view/13647. Acesso em: 6 dec. 2025.