YASSIN, S.Kh.; KHDHIR, B. H.; HUSSEIN, B. H.; ABD, G. A. Improvement the Action Efficiency of Microwave Vacuum Tube Type GI-19B by Activation its Intersurfaces. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 21, n. 2, p. 36–44, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1347. Acesso em: 3 apr. 2025.