Mittra, R. . “Characteristic Basis Function Method (CBFM)—An Iteration-Free Domain Decomposition Approach in Computational Electromagnetics”. Applied Computational Electromagnetics Society Journal (ACES), vol. 24, no. 2, June 2022, pp. 204-23, https://journals.riverpublishers.com/index.php/ACES/article/view/15907.