@article{article2c30f1c4,
title   = {Portable X-ray fluorescence system to measure 'TH' and 'U' concentrations},
author = {Silveira, Marcilei A. Guazzelli da and Pereira, Bruno Ribeiro and Medina, Nilberto Heder and Rizzutto, Márcia de Almeida},
year = {2018},
doi = {10.1016/j.jenvrad.2018.04.012},
journal   = {Journal of Environmental Radioactivity}
}