Pires, Luiz, F.A.M. Cássaro, L. Tech, Luís Pereira, and Jocenei Oliveira. (01/2020AD) 2020. “Gamma Ray Attenuation For Determining Soil Density: Laboratory Experiments For Environmental Physics And Engineering Courses”. Revista Brasileira De Ensino De Física 42. doi:10.1590/1806-9126-rbef-2019-0340.
