Fichtner, S.S. et al. 2007. MINERAL COMPOSITION OF SOILS, FORAGE AND ANIMAL TISSUE IN THE RIO VERDE REGION, GOIÁS, BRAZIL: COOPER, MOLYBDENIUM AND SELENIUM. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]. 20, 1 (Dec. 2007), 1–6. DOI:https://doi.org/10.5216/pat.v20i1.2582.