Seo, S. M. ., J.-F. . Lee, and C.-F. . Wang. “Analyzing PEC Scattering Structure Using an IE-FFT Algorithm””. Applied Computational Electromagnetics Society Journal (ACES), vol. 24, no. 2, June 2022, pp. 116-28, https://journals.riverpublishers.com/index.php/ACES/article/view/15895.