@article{vieira_tillotson_biggar_nielsen_1997,  title={Scaling of semivariograms and the kriging estimation of field-measured properties},  volume={21},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06831997000400001},  DOI={10.1590/S0100-06831997000400001},  number={4},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Vieira, S. R. and Tillotson, P. M. and Biggar, J. W. and Nielsen, D. R.},  year={1997},  month={Oct},  pages={525–533} }