Haijin Wang, Anping Xu & Qi Tao. (2023). Analysis of the Implicit-Explicit Ultra-Weak Discontinuous Galerkin Method for Convection-Diffusion Problems.
            <i>Journal of Computational Mathematics</i>. <i>42</i> (1).
            1-23.
         doi:10.4208/jcm.2202-m2021-0290