Nóbrega, J.C.A. et al. (2001) “Aggregate stability in two cropped and no-cropped Oxisols as affected by phosphate addition and mycorrhiza”, Pesquisa Agropecuaria Brasileira, 36(11), pp. 1425–1435. doi:10.1590/S1678-3921.pab2001.v36.6276.