Super-Closeness Between the Ritz Projection and the Finite Element Solution for Some Elliptic Problems. Communications in Computational Physics, [S. l.], v. 28, n. 2, p. 803–826, 2020. DOI: 10.4208/cicp.OA-2019-0154. Disponível em: https://global-sci.com/index.php/cicp/article/view/6862. Acesso em: 6 dec. 2025.