A V-Cycle Multigrid for Quadrilateral Rotated $Q_1$ Element with Numerical Integration. Journal of Computational Mathematics, [S. l.], v. 21, n. 5, p. 545–554, 2021. Disponível em: https://global-sci.com/index.php/JCM/article/view/11580. Acesso em: 5 dec. 2025.