@article{1996,  title={Universidade Federal do Rio Grande do Sul},  volume={10},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33061996000200017},  DOI={10.1590/S0102-33061996000200017},  number={2},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  year={1996},  month={Dec},  pages={421–425} }