An Improved Two-Grid Technique for the Nonlinear Time-Fractional Parabolic Equation Based on the Block-Centered Finite Difference Method. JCM [Internet]. 2022 Oct. 6 [cited 2025 Dec. 5];40(3):453-71. Available from: https://www.global-sci.com/index.php/JCM/article/view/12495