YongLiu, Chi-WangShu & MengpingZhang. (2021). Sub-Optimal Convergence of Discontinuous Galerkin Methods with Central Fluxes for Linear Hyperbolic Equations with Even Degree Polynomial Approximations.
            <i>Journal of Computational Mathematics</i>. <i>39</i> (4).
            518-537.
         doi:10.4208/jcm.2002-m2019-0305