Baria, R., S. Watanabe, C. S. Munita, P. C. S. Silva, and S. Tatumi. “Levels of Thorium, Uranium and Potassium in Brazilian Geological Sediment Determined by Gamma-Ray Spec-Troscopy and Instrumental Neutron Activation Analysis”. 2022. Brazilian Journal of Radiation Sciences, vol. 10, no. 3B (Suppl.), Jan. 2023, doi:10.15392/2319-0612.2022.1984.