@article{articled9c77afa,
title   = {Rare earth elements as tracers of sediment contamination by phosphogypsum in the Santos estuary, southern Brazil},
author = {Oliveira, Sonia Maria Barros de and Silva, Paulo Sérgio Cardoso da and Mazzilli, Barbara Pacci and Fávaro, Deborah Inês Teixeira and Saueia, Catia Heloisa},
year = {2007},
doi = {10.1016/j.apgeochem.2006.12.017},
journal   = {Applied Geochemistry}
}