@article{amarilho-silveira_2025,  title={Estimation of productive efficiency in ewes from the natural grasslands of Southern Brazil: A pilot approach},  volume={26},  ISSN={1809-6891},  url={https://doi.org/10.1590/1809-6891v26e-81645E},  DOI={10.1590/1809-6891v26e-81645E},  journal={Ciência Animal Brasileira},  publisher={Universidade Federal de Goiás},  author={Amarilho-Silveira, Fernando},  year={2025},  pages={81645E} }