@article{article791ef450,
title   = {Natural radioactivity and external hazard index in Brazilian sands},
author = {Guazzelli, Marcilei Aparecida and Medina, Nilberto Heder and Aguiar, Vitor Ângelo Paulino de},
year = {2021},
doi = {10.1007/s10967-021-07707-x},
journal   = {Journal of Radioanalytical and Nuclear Chemistry}
}