@inproceedings{inproceedingsd5fc136a,
title   = {Radon exposure in abandoned metalliferous mines of south america},
author = {Silva, A. A. R. da and Umisedo, Nancy Kuniko and Yoshimura, Elisabeth Mateus and Anjos, R. M. and Valladares, D. L. and Velasco, H and Rizzotto, M},
year = {2011},
publisher = {SBF},
booktitle   = {Econtro de Física}
}