T. Burokas and S. Štaras, “Properties of the Retard System Models Based on the Complex Cross Section Multiconductor Lines”, ELEKTRON ELEKTROTECH, vol. 84, no. 4, pp. 3–8, Apr. 2008, Accessed: Feb. 08, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/11086