Silva, R.A.M. et al. 2013. Performance, carcass and meat quality of pigs fed diets with antioxidants and ractopamina. Semina: Ciências Agrárias. 34, 6Supl2 (Dec. 2013), 3971–3982. DOI:https://doi.org/10.5433/1679-0359.2013v34n6Supl2p3971.