Aloízio Soares Ferreira, Gregório Murilo de Oliveira Júnior, Francisco Carlos de Oliveira Silva, Rita Flávia Miranda de Oliveira, & Edney Pereira da Silva. (2013). Ractopamine for Pigs: A Review about Nutritional Requirements . Journal of Basic & Applied Sciences, 9, 276–285. https://doi.org/10.6000/1927-5129.2013.09.36