@article{martins_bataglia_camargo_2003,  title={Copper, nickel and zinc phytoavailability in an oxisol amended with sewage sludge and liming},  volume={60},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162003000400021},  DOI={10.1590/S0103-90162003000400021},  number={4},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Martins, Adão Luiz Castanheiro and Bataglia, Ondino Cleante and Camargo, Otávio Antonio de},  year={2003},  month={Oct},  pages={747–754} }