Li , DiLiu , MinLu , Xiliang and Yang , Jerry Zhijian. (2022). The Discontinuous Galerkin Method by Patch Reconstruction for Helmholtz Problems.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>15</i> (1).
            30-48.
         doi:10.4208/aamm.OA-2022-0008