ANASTASSIOU, George A. Converse Fractional Opial Inequalities for Several Functions. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 1, p. 117–142, 2008. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1530. Acesso em: 12 oct. 2025.