G ABDULAHAD, G.; H SALLO, A. A local Existence Theorem For Certain Fractional Differential Equations. Journal of Education and Science, [S. l.], v. 18, n. 2, p. 117–125, 2007. DOI: 10.33899/edusj.2007.163006. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/41697. Acesso em: 9 sep. 2025.