Muniz, L.C. et al. 2012. Soil biological attributes in pastures of different ages in a crop‑livestock integrated system. Pesquisa Agropecuaria Brasileira. 46, 10 (Jan. 2012), 1262–1268. DOI:https://doi.org/10.1590/S1678-3921.pab2011.v46.8533.