C. A. Ceretta, R. Durigon, C. J. Basso, L. A. R. Barcellos, and F. C. B. Vieira, “Soil chemical characteristics of native pasture affected by liquid swine manure”, PAB, vol. 38, no. 6, pp. 729–735, Jun. 2003, doi: 10.1590/S1678-3921.pab2003.v38.6630.