@article{ritter_waechter_2004,  title={Biogeografia do gênero Mikania Willd. (Asteraceae) no Rio Grande do Sul, Brasil},  volume={18},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33062004000300021},  DOI={10.1590/S0102-33062004000300021},  number={3},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Ritter, Mara Rejane and Waechter, Jorge Luiz},  year={2004},  month={Jul},  pages={643–652} }