Buyang Li, Jilu Wang & Weiwei Sun. (2020). The Stability and Convergence of Fully Discrete Galerkin-Galerkin FEMs for Porous Medium Flows.
            <i>Communications in Computational Physics</i>. <i>15</i> (4).
            1141-1158.
         doi:10.4208/cicp.080313.051213s