@article{articlec6beacff,
title   = {Biosolids conditioning and the availability of 'Cu' and 'Zn' for rice},
author = {Pires, A. M. and Mattiazzo, Maria Emília},
year = {2003},
doi = {10.1590/s0103-90162003000100024},
journal   = {Scientia Agricola}
}