ANASTASSIOU, G. A. Poincar´e Type Inequalities for Linear Differential Operators. CUBO, A Mathematical Journal, [S. l.], v. 10, n. 3, p. 13–20, 2008. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1496. Acesso em: 3 may. 2024.