Callegari, Marco Aurélio, et al. “Brazilian Panorama of Pig Breeding Sector: A Cross-Sectional Study about Specific Aspects of Biosecurity, Facilities, Management, Feeding, and Performance”. Semina: Ciências Agrárias, vol. 41, no. 2, Mar. 2020, pp. 587-06, doi:10.5433/1679-0359.2020v41n2p587.