ELIAS, Mazin M. Monte Carlo Simulation for Bremsstrahlung Buildup Factor Produced by Absorption of Y-91 Beta Rays. Iraqi Journal of Physics, Baghdad, Iraq., v. 9, n. 14, p. 31–38, 2011. Disponível em: https://www.ijp.uobaghdad.edu.iq/index.php/physics/article/view/813. Acesso em: 2 may. 2025.