Alavikia, B. ., and O. M. . Ramahi. “Fundamental Limitations on the Use of Open-Region Boundary Conditions and Matched Layers to Solve the Problem of Gratings in Metallic Screens”. Applied Computational Electromagnetics Society Journal (ACES), vol. 25, no. 8, June 2022, pp. 652-8, https://journals.riverpublishers.com/index.php/ACES/article/view/15745.