Ricci, G. D., Gonçalves Titto, C., Oliveira da Silva Miranda, K., Nardin Berto, P., Lencioni Titto, E. and de Azevedo Ruiz, V. L. (2019) “Evaluation of routine procedures in swine production as estimative methods of stress through the application of vocalization and speed of handling”, Investigación Agraria. San Lorenzo, PY, 21(2), pp. 117–123. doi: 10.18004/investig.agrar.2019.diciembre.117-123 .