Cascadic Multigrid Method for the Mortar Element Method for $P_1$ Nonconforming Element. Journal of Computational Mathematics, [S. l.], v. 23, n. 4, p. 425–440, 2005. Disponível em: https://gsp.tricubic.dev/JCM/article/view/11722. Acesso em: 14 mar. 2026.