Symmetric Point Structure of Superconvergence for Cubic Triangular Elements—A Consultation with Zhu. Journal of Computational Mathematics, [S. l.], v. 21, n. 6, p. 727–732, 2021. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11596. Acesso em: 6 dec. 2025.