@article{demarco_2017,  title={Floral glands in asclepiads: structure, diversity and evolution},  volume={31},  ISSN={0102-3306},  url={https://doi.org/10.1590/0102-33062016abb0432},  DOI={10.1590/0102-33062016abb0432},  number={3},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Demarco, Diego},  year={2017},  month={Jul},  pages={477–502} }