Yang , WeiLiu , XinHe , Bin and Huang , Yunqing. (2022). The a Posteriori Error Estimator of SDG Method for Variable Coefficients Time-Harmonic Maxwell's Equations.
            <i>Journal of Computational Mathematics</i>. <i>41</i> (2).
            263-286.
         doi:10.4208/jcm.2112-m2020-0330