@article{villagran_2021,  title={Implementation of ventilation towers in a greenhouse established in low altitude tropical climate conditions: numerical approach to the behavior of the natural ventilation},  volume={68},  ISSN={0034-737X},  url={https://doi.org/10.1590/0034-737X202168010002},  DOI={10.1590/0034-737X202168010002},  number={1},  journal={Revista Ceres},  publisher={Universidade Federal de Viçosa},  author={Villagran, Edwin},  year={2021},  month={Jan},  pages={10–22} }