@article{cunha_nardi_muller_2012,  title={Biogeochemistry of REE elements and tetrad effect in the soil-plant system: a study on volcanic rock covers in southernmost Brazil},  volume={84},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652012005000069},  DOI={10.1590/S0001-37652012005000069},  number={4},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Cunha, Maria do Carmo Lima e and Nardi, Lauro V.S. and Muller, Ingke F.},  year={2012},  month={Dec},  pages={911–918} }