@article{kronhardt_gastmann_fior_freitas_2021,  title={Agroforestry systems, legislation and sustainability of small farms in Rio Grande do Sul, Brazil},  volume={68},  ISSN={0034-737X},  url={https://doi.org/10.1590/0034-737X202168060001},  DOI={10.1590/0034-737X202168060001},  number={6},  journal={Revista Ceres},  publisher={Universidade Federal de Viçosa},  author={Kronhardt, Míriam Helena and Gastmann, Julia and Fior, Claudimar Sidnei and Freitas, Elisete Maria de},  year={2021},  month={Nov},  pages={503–510} }