@article{article0938bf17,
title   = {Sampling planning of micronutrients and aluminium of the soils of São Paulo, Brazil},
author = {Marques Jr., José and Alleoni, Luis Reynaldo Ferracciú and Teixeira, Daniel de Bortoli and Siqueira, Diego Silva and Pereira, Gener Tadeu},
year = {2015},
doi = {10.1016/j.geodrs.2014.12.004},
journal   = {Geoderma Regional}
}