Li , XiaoliChen , Yanping and Chen , Chuanjun. (2022). An Improved Two-Grid Technique for the Nonlinear Time-Fractional Parabolic Equation Based on the Block-Centered Finite Difference Method.
            <i>Journal of Computational Mathematics</i>. <i>40</i> (3).
            453-471.
         doi:10.4208/jcm.2011-m2020-0124