Lee, J. ., and J. . Zhang. “Performance of Preconditioned Krylov Iterative Methods for Solving Hybrid Integral Equations in Electromagnetics”. Applied Computational Electromagnetics Society Journal (ACES), vol. 18, no. 3, June 2022, pp. 54-61, https://journals.riverpublishers.com/index.php/ACES/article/view/16797.