Hou , TianliangLiu , ChunmeiDai , ChunleiChen , Luoping and Yang , Yin. (2022). Two-Grid Algorithm of $H^{1}$-Galerkin Mixed Finite Element Methods for Semilinear Parabolic Integro-Differential Equations. Journal of Computational Mathematics. 40 (5). 667-685. doi:10.4208/jcm.2101-m2019-0159