Silva, Rogério Ferreira da, et al. “Soil Invertebrate Macrofauna under Different Production Systems in a Hapludox in the Cerrado Region”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 4, Apr. 2006, pp. 697-04, doi:10.1590/S1678-3921.pab2006.v41.7194.