NASSEF MH; NAWAL M. SAID. Determination of Uranium, Thorium,238U/232Th Activity Ratio and Rare Earth Elements Distribution Using Neutron Activation Analysis (NAA). International Journal of Life Sciences, India, v. 7, n. 4, p. 616–624, 2019. Disponível em: https://ijlsci.in/ls/index.php/home/article/view/274. Acesso em: 24 nov. 2024.