Liu, Z. ., R. . Chen, D. . Ding, and L. . Le. “GTD Model Based Cubic Spline Interpolation Method for Wide-Band Frequency- and Angular- Sweep”. Applied Computational Electromagnetics Society Journal (ACES), vol. 26, no. 8, May 2022, pp. 696-04, https://journals.riverpublishers.com/index.php/ACES/article/view/15429.