Prado, Renato de Mello, and Renata Moreira Leal. “NUTRITIONAL DISORDERS BY DEFICIENCY IN SUNFLOWER Var. CATISSOL-01”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 36, no. 3, Oct. 2007, pp. 187-93, https://doi.org/10.5216/pat.v36i3.2046.