Burokas, T., and S. Štaras. “Properties of Helical and Serpentine Slow-Wave Systems Containing Dielectric Holders”. Elektronika ir Elektrotechnika 53, no. 4 (April 19, 2004). Accessed April 16, 2024. https://eejournal.ktu.lt/index.php/elt/article/view/10908.