@article{article6e9f803f,
title   = {Natural occurrence of hexavalent chromium in a sedimentary aquifer in Urânia, State of São Paulo, Brazil},
author = {Bourotte, C. L. M. and Bertolo, Reginaldo Antonio and Almodovar, Marta Lúcia Nunes and Hirata, Ricardo},
year = {2009},
doi = {10.1590/s0001-37652009000200009},
journal   = {Anais da Academia Brasileira de Ciências}
}