, A. Y. S.; GITARAM PAWAR. Existence Solution for Nonlinear Fractional Differential Equation by the Method of Lower and Upper Solution. International Journal of Mathematics And its Applications, [S. l.], v. 11, n. 4, p. 19–25, 2023. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1378. Acesso em: 7 oct. 2024.