Silva, Késia Oliveira da, Irenilza de Alencar Nääs, and Samatha Gil de Souza Campos. 2004. “Comparison of the Use of Traceability for Swine in Group or Individually”. Brazilian Journal of Veterinary Research and Animal Science 41 (5): 327-31. https://doi.org/10.1590/S1413-95962004000500006.