Existence and Uniqueness of Positive Solutions for System of (p,q,r)-Laplacian Fractional Order Boundary Value Problems. Advances in the Theory of Nonlinear Analysis and its Application, [S. l.], v. 5, n. 1, p. 138–157, 2021. DOI: 10.17762/atnaa.v5.i1.189. Disponível em: https://atnaea.org/index.php/journal/article/view/189.. Acesso em: 4 jul. 2024.