Daškevičius, V., J. Skudutis, A. Katkevičius, and S. Štaras. “Simulation and Properties of the Wide-Band Hybrid Slow-Wave System”. Elektronika Ir Elektrotechnika, vol. 104, no. 8, Oct. 2010, pp. 43-46, https://eejournal.ktu.lt/index.php/elt/article/view/9224.