Superconvergence Analysis of the Polynomial Preserving Recovery for Elliptic Problems with Robin Boundary Conditions. Journal of Computational Mathematics, [S. l.], v. 38, n. 1, p. 223–238, 2020. DOI: 10.4208/jcm.1911-m2018-0176. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/12407. Acesso em: 6 dec. 2025.