AL-MOUDARRIS, Fatin A J; ABD ALI, Maher M; HUSSEIN, Oday A. Design of an Einzel Lens Using Non-Classical Variation Technique. Al-Nahrain Journal of Science, [S. l.], v. 15, n. 2, p. 84–87, 2012. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/1068. Acesso em: 22 may. 2026.