Haixia Dong, Wenjun Ying & Jiwei Zhang. (2023). An Efficient Cartesian Grid-Based Method for Scattering Problems with Inhomogeneous Media.
            <i>Numerical Mathematics: Theory, Methods and Applications</i>. <i>16</i> (2).
            541-564.
         doi:10.4208/nmtma.OA-2022-0159