Sum-peak method with two NaI(Tl) crystals: 68(Ge+Ga) standardization. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 7, n. 3B (Suppl.), 2019. DOI: 10.15392/bjrs.v7i3B.862. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/862.. Acesso em: 13 may. 2024.