HUSSEIN, B.H. The Space-Charge Effect on Theoretical Design of the Electron Gun Operated under Finite Magnification Condition. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 20, n. 1, p. 1–11, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1303. Acesso em: 31 mar. 2025.