Nodal $\mathcal{O}(h^4)$-Superconvergence in 3D by Averaging Piecewise Linear, Bilinear, and Trilinear FE Approximations. Journal of Computational Mathematics, [S. l.], v. 28, n. 1, p. 1–10, 2018. DOI: 10.4208/jcm.2009.09-m1004. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11969. Acesso em: 5 dec. 2025.