Substructuring Preconditioners with a Simple Coarse Space for 2-D 3-T Radiation Diffusion Equations. Commun. Comput. Phys. [Internet]. 2018 Aug. 21 [cited 2025 Dec. 5];23(2):540-6. Available from: https://www.global-sci.com/index.php/cicp/article/view/6530