@article{tavares filho_tessier_2010,  title={Effects of different management systems on porosity of oxisols in Paraná, Brazil},  volume={34},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06832010000300031},  DOI={10.1590/S0100-06832010000300031},  number={3},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Tavares Filho, João and Tessier, Daniel},  year={2010},  month={May},  pages={899–906} }