Bellaver, C. et al. 2014. Effects of copper, iron and zinc in the ration on the performance of growing-finishing pigs. Pesquisa Agropecuaria Brasileira. 17, 9 (Apr. 2014), 1377–1388. DOI:https://doi.org/10.1590/S1678-3921.pab1982.v17.16299.