@article{Tollefsen_2014,
title={From the European indoor radon map towards an atlas of natural radiation},
volume={162},
ISSN={1742-3406},
url={http://dx.doi.org/10.1093/rpd/ncu244},
DOI={10.1093/rpd/ncu244},
number={1–2},
journal={Radiation Protection Dosimetry},
publisher={Oxford University Press (OUP)},
author={Tollefsen,
T. and Cinelli,
G. and Bossew,
P. and Gruber,
V. and De Cort,
M.},
year={2014},
month=jul,
pages={129–134} }