Pauline Klein, Xavier Antoine, Christophe Besse and Matthias Ehrhardt. (2011). Absorbing Boundary Conditions for Solving <em>N</em>-Dimensional Stationary Schrödinger Equations with Unbounded Potentials and Nonlinearities.
            <i>Communications in Computational Physics</i>. <i>10</i> (5).
            1280-1304.
         doi:10.4208/cicp.251010.160211a