BELARBI, S.; DAHMANI, Z. Solvability For a Nonlinear Coupled System of n Fractional Differential Equations. MATEMATIKA: Malaysian Journal of Industrial and Applied Mathematics, [S. l.], v. 30, p. 123–133, 2014. DOI: 10.11113/matematika.v30.n.704. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/704. Acesso em: 28 sep. 2021.