S. N. Chandler-Wilde, S. Langdon & M. Mokgolele. (2020). A High Frequency Boundary Element Method for Scattering by Convex Polygons with Impedance Boundary Conditions.
            <i>Communications in Computational Physics</i>. <i>11</i> (2).
            573-593.
         doi:10.4208/cicp.231209.040111s