Marchão, Robelio Leandro, et al. “Soil Macrofauna under Integrated crop‑livestock Systems in a Brazilian Cerrado Ferralsol”. Pesquisa Agropecuaria Brasileira, vol. 44, no. 8, Nov. 2010, pp. 1011-20, doi:10.1590/S1678-3921.pab2009.v44.1362.