Algebraic Multigrid Block Preconditioning for Multi-Group Radiation Diffusion Equations. Communications in Computational Physics, [S. l.], v. 29, n. 3, p. 831–852, 2021. DOI: 10.4208/cicp.OA-2020-0030. Disponível em: https://www.global-sci.com/index.php/cicp/article/view/6941. Acesso em: 5 dec. 2025.