Superconvergence of Least-Squares Mixed Finite Element for Second-Order Elliptic Problems. Journal of Computational Mathematics, [S. l.], v. 21, n. 6, p. 825–832, 2021. Disponível em: https://global-sci.com/index.php/JCM/article/view/11604. Acesso em: 26 feb. 2026.