TEAM, S. On the Existence of Positive Solutions for a Boundary Valued Problem of Fractional Order: Moustafa El-Shahed. Thai Journal of Mathematics, [S. l.], v. 5, n. 1, p. 143–150, 2007. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/82. Acesso em: 29 apr. 2024.