Vaupel, T. . “A Fast Spectral Domain Solver for the Characterization of Larger Microwave Structures in Multilayered Environments”. Applied Computational Electromagnetics Society Journal (ACES), vol. 24, no. 5, June 2022, pp. 493-0, https://journals.riverpublishers.com/index.php/ACES/article/view/15993.