The characterization of naturally occurring radionuclides in concrete incorporating fly ash as partial cement replacement. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 6, n. 1, 2018. DOI: 10.15392/bjrs.v6i1.193. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/193. Acesso em: 2 may. 2025.