Maximization Problems for Second Order Elliptic Equations. Contemporary Mathematics , [S. l.], v. 2, n. 2, p. 131–139, 2021. DOI: 10.37256/cm.222021710. Disponível em: https://ojs353.mebyme.cn/index.php/CM/article/view/710. Acesso em: 24 dec. 2025.