Application of semi-empirical model for the evaluation of radium activity in phosphogypsum used as component of clinker. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 9, n. 1A, 2021. DOI: 10.15392/bjrs.v9i1A.1518. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1518.. Acesso em: 18 dec. 2024.