Kejia Pan, Xiaoxin Wu, Yunlong Yu, Zhiqiang Sheng & Guangwei Yuan. (2022). Extrapolation Cascadic Multigrid Method for Cell-Centered FV Discretization of Diffusion Equations with Strongly Discontinuous and Anisotropic Coefficients. Communications in Computational Physics. 31 (5). 1561-1584. doi:10.4208/cicp.OA-2021-0185