Design of six electrode Enzial electrostatic lens low aberrations for electron gun. Baghdad Science Journal, Iraq, Baghdad, v. 7, n. 3, p. 1127–1131, 2010. DOI: 10.21123/bsj.2010.7.3.1127-1131. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1080.. Acesso em: 3 may. 2024.