Chen , YanpingGu , QilingLi , Qingfeng and Huang , Yunqing. (2022). A Two-Grid Finite Element Approximation for Nonlinear Time Fractional Two-Term Mixed Sub-Diffusion and Diffusion Wave Equations.
            <i>Journal of Computational Mathematics</i>. <i>40</i> (6).
            936-954.
         doi:10.4208/jcm.2104-m2021-0332