TH. AL-SHAMMA, M. Minimization of the Projector Focal Length of the Double Air Gap Electromagnetic Lenses. Rafidain Journal of Science, [S. l.], v. 24, n. 2, p. 98–107, 2013. DOI: 10.33899/rjs.2013.67489. Disponível em: https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47683. Acesso em: 10 sep. 2025.