“Direct Simulation Methods for Scalar-Wave Envelopes in Two-Dimensional Layered Random Media Based on the Small-Angle Scattering Approximation”, Commun. Comput. Phys., vol. 3, no. 1, pp. 63–84, Jan. 2008, Accessed: Dec. 06, 2025. [Online]. Available: https://global-sci.com/index.php/cicp/article/view/5504