@article{campos_roque-specht_leitão_2026,  title={From linear to circular pig farming: a systematic literature review},  volume={64},  ISSN={0103-2003},  url={https://doi.org/10.1590/1806-9479.2026.304386},  DOI={10.1590/1806-9479.2026.304386},  journal={Revista de Economia e Sociologia Rural},  publisher={Sociedade Brasileira de Economia e Sociologia Rural (SOBER)},  author={Campos, Gevair and Roque-Specht, Vânia Ferreira and Leitão, Fabrício Oliveira},  year={2026},  pages={e304386} }