Kulish, Viktor, Olexandr Lysenko, Igor Gubanov, and Vаldenmayer Georgy. “The Project of the Compact Media-Accelerator for the Two-Stream Superheterodyne Free Electron Laser”. Proceedings of National Aviation University (archive) 33, no. 3-4 (March 1, 2007): 171–173. Accessed April 18, 2026. http://jrnl.kai.edu.ua/index.php/visnik/article/view/1519.