Kulish V, Lysenko A, Mayornikov I. THE TWO-STREAM MULTI-HARMONIC FEL AS A POWERFUL SOURCE OF FEMTO-SECOND WAVE PACKAGES. Proceedings of National Aviation University [Internet]. 2005 Feb. 1 [cited 2026 Jun. 14];24(2):131-4. Available from: http://jrnl.kai.edu.ua/index.php/visnik/article/view/1164