Santos, M.C. dos et al. (2008) “CHEMICAL AND MICROBIOLOGICAL SOIL CHARACTERIZATION AND Brachiaria brizantha BIOMASS PRODUCTION, AT DIFFERENT SAMPLING PERIODS”, Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], 38(1), pp. 6–13. doi:10.5216/pat.v38i1.3612.