V. Sinkevicius, D. Virzonis, L. Sumskiene, and T. Jukna, “Cathode Positioning System for Multiple Beam Electron Gun”, ELEKTRON ELEKTROTECH, vol. 69, no. 5, pp. 21–24, May 2006, Accessed: Jan. 22, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/10668