GAAFER, Fatma N. Design of Achromatic Combined Quadrupole Lens Using the Modified Bell-Shaped Field Distribution Model. Iraqi Journal of Physics, Baghdad, Iraq., v. 9, n. 16, p. 66–72, 2011. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/790. Acesso em: 8 apr. 2025.