A. Al-Khashab, Muna, Abdullah I. Mostafah, and Issam I. Ismail. “Design and Fabrication of the Single Polepiece Magnetic Electron Lens of Truncated Cone Polepiece Shape”. Al-Rafidain Engineering Journal (AREJ) 19, no. 3 (June 28, 2011): 49–54. Accessed September 8, 2025. https://jamh.uomosul.edu.iq/index.php/arej/article/view/30561.