Lysenko A, Volk I, Serozhko A, Rybalko O. MULTIPLE THREE-WAWE RESONANCES IN TWO-STREAM FREE-ELECTRON LASER WITH A HELICAL ELECTRON BEAM. ITS [Internet]. 2018Jul.3 [cited 2025Sep.26];(1):58-64. Available from: https://infotelesc.kpi.ua/article/view/136674