Rosa, B. and Rocha, G.P. (2007) “THE VALUE INDEX AND THE NITROGEN BALANCE OF Brachiaria decumbens AND Brachiaria ruziziensis AT DIFFERENT GROWTH STAGES”, Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], 18(1), pp. 35–46. doi:10.5216/pat.v18i1.2541.