Davidson, David B. “Higher-Order (LT/QN) Vector Finite Elements for Waveguide Analysis”. Applied Computational Electromagnetics Society Journal (ACES) 17, no. 1 (July 9, 2022): 1–10. Accessed May 13, 2026. https://journals.riverpublishers.com/index.php/ACES/article/view/16891.