H. SALLO, A. Existence and Uniqueness Theorems For Non- Linear Fractional Differential Equations. Journal of Education and Science (JES), [S. l.], v. 18, n. 2, p. 104–116, 2006. DOI: 10.33899/edusj.2006.79262. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17577. Acesso em: 4 aug. 2025.