@article{souza_marques júnior_pereira_barbieri_2006,  title={Small relief shape variations influence spatial variability of soil chemical attributes},  volume={63},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162006000200008},  DOI={10.1590/S0103-90162006000200008},  number={2},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Souza, Zigomar Menezes de and Marques Júnior, José and Pereira, Gener Tadeu and Barbieri, Diogo Mazza},  year={2006},  month={Mar},  pages={161–168} }