The characterization of naturally occurring radionuclides in concrete incorporating fly ash as partial cement replacement. Brazilian Journal of Radiation Sciences (BJRS), Rio de Janeiro, Brazil, v. 6, n. 1, 2018. DOI: 10.15392/bjrs.v6i1.193. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/193. Acesso em: 19 jul. 2025.