Leitão, Rodrigo Afonso, et al. “NUTRITIVE VALUE OF COFFEE (Coffea Arabica L.) HULLS TREATED WITH SODIUM HYDROXIDE AND OR UREA SUPPLEMENTED WITH ALFALFA (Medicago Sativa L.) HAY”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 35, no. 1, Nov. 2007, pp. 31-36, https://revistas.ufg.br/pat/article/view/2283.