Bellaver, Claudio, Elias Tadeu Fialho, Jerônimo Antônio Fávero, Luis Carlos Ajala, and José Severino Neto. “Levels of Ractopamine in the Diet and Effects on Performance and Carcass Characteristics of Finishing Pigs”. Pesquisa Agropecuaria Brasileira 26, no. 10 (October 1, 1991): 1795–1802. Accessed July 6, 2026. https://apct.sede.embrapa.br/pab/article/view/3527.