Multigrid Algorithm for the Coupling System of Natural Boundary Element Method and Finite Element Method for Unbounded Domain Problems. Journal of Computational Mathematics, [S. l.], v. 25, n. 1, p. 13–26, 2018. Disponível em: https://global-sci.com/index.php/JCM/article/view/11805. Acesso em: 5 dec. 2025.