@article{article056ccd19,
title   = {Radioactivity and radiogenic heat production in the sediments of the São Francisco sedimentary basin, central Brazil},
author = {Roque, Arnaldo and Brenha Ribeiro, Fernando},
year = {1997},
doi = {10.1016/s0969-8043(96)00228-x},
journal   = {Applied Radiation and Isotopes}
}