@article{pereira_trindade_2014,  title={Control of ammonia emissions in naturally ventilated dairy cattle facilities in Portugal},  volume={34},  ISSN={0100-6916},  url={https://doi.org/10.1590/S0100-69162014000300022},  DOI={10.1590/S0100-69162014000300022},  number={3},  journal={Engenharia Agrícola},  publisher={Associação Brasileira de Engenharia Agrícola},  author={Pereira, José and Trindade, Henrique},  year={2014},  month={May},  pages={600–609} }