LYSENKO, A.; VOLK, I.; SEROZHKO, A.; RYBALKO, O. MULTIPLE THREE-WAWE RESONANCES IN TWO-STREAM FREE-ELECTRON LASER WITH A HELICAL ELECTRON BEAM. Information and Telecommunication Sciences, [S. l.], n. 1, p. 58–64, 2018. DOI: 10.20535/2411-2976.12018.58-64. Disponível em: https://infotelesc.kpi.ua/article/view/136674. Acesso em: 26 sep. 2025.