Dongfang Li, Hong-Lin Liao, Weiwei Sun, Jilu Wang & Jiwei Zhang. (2020). Analysis of L1-Galerkin FEMs for Time-Fractional Nonlinear Parabolic Problems.
            <i>Communications in Computational Physics</i>. <i>24</i> (1).
            86-103.
         doi:10.4208/cicp.OA-2017-0080