Cabas-Monje, J., Améstica-Rivas, L., Labra-Hernández, J., Guesmi, B., & Gil, J. M. (2021). Efficiency in swine production in European countries. Cases of Denmark and Poland. Revista Científica De La Facultad De Ciencias Veterinarias, 31(1), 31 - 39. https://doi.org/10.52973/rcfcv-luz311.art4