“Nodal $\mathcal{O}(h^4)$-Superconvergence in 3D by Averaging Piecewise Linear, Bilinear, and Trilinear FE Approximations”. Journal of Computational Mathematics 28, no. 1 (August 22, 2018): 1–10. Accessed December 6, 2025. https://global-sci.com/index.php/JCM/article/view/11969.