An, Y. ., Z. . Fan, D. . Ding, and R. . Chen. “FPO-Based Shooting and Bouncing Ray Method for Wide-Band RCS Prediction”. Applied Computational Electromagnetics Society Journal (ACES), vol. 29, no. 04, Sept. 2021, pp. 279-88, https://journals.riverpublishers.com/index.php/ACES/article/view/11031.