de Almeida, Semíramis Pedrosa. “Phenological Groups of Perennial Grass Community on ‘campo-Cerrado’ Area in the Federal District of Brazil”. Pesquisa Agropecuaria Brasileira, vol. 30, no. 8, Aug. 1995, pp. 1067-73, doi:10.1590/S1678-3921.pab1995.v30.4398.