Cui, Zhiwei, and Yiping Han. 2022. “A Hybrid Finite Element-Boundary Integral-Characteristic Basis Function Method for Scattering by Multiple 3-D Cavities”. Applied Computational Electromagnetics Society Journal (ACES) 27 (06):491-96. https://journals.riverpublishers.com/index.php/ACES/article/view/13355.