Oliveira, Estela Maria, Akira Iwahara, Roberto Poledna, Carlos José da Silva, Paulo Alberto Lima da Cruz, Regio dos Santos Gomes, José Ubiratan Delgado, and Ricardo Tadeu Lopes. 2019. “Sum-Peak Method With Two NaI(Tl) Crystals: 68(Ge+Ga) Standardization”. Brazilian Journal of Radiation Sciences 7 (3B (Suppl.). https://doi.org/10.15392/bjrs.v7i3B.862.