A study on the cost of concrete shielding in a conventional radiotherapy facility room. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 6, n. 2, 2018. DOI: 10.15392/bjrs.v6i2.502. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/502. Acesso em: 3 may. 2025.