B. Rosa and A. J. S. Borges, “AVALIATION OF THE BEST AGE FOR HAYMAKING OF GRASS ANDROPOGON (Andropogon gayanus var. bisquamulatus cv. Planaltina): CHEMICAL COMPOSITION”, Pesq. Agropec. Trop., vol. 20, no. 1, pp. 65–72, Dec. 2007, doi: 10.5216/pat.v20i1.2595.