Ling Guan, and Shifei Tao. “Time Domain Parabolic Equation Method for Scattering Analysis of Electrically Large Coated Objects by Using Impedance Boundary Condition”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 33, no. 12, July 2021, pp. 1352-9, https://journals.riverpublishers.com/index.php/ACES/article/view/8837.