@article{berg_oliveira_2000,  title={Variability of apparently homogeneous soilscapes in São Paulo state, Brazil: I. spatial analysis},  volume={24},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06832000000200015},  DOI={10.1590/S0100-06832000000200015},  number={2},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Berg, M. van Den and Oliveira, J. B.},  year={2000},  month={Apr},  pages={377–391} }