@article{austin_1981,  title={Novidades nas Convolvulaceae da flora amazônica},  volume={11},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921981112291},  DOI={10.1590/1809-43921981112291},  number={2},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  author={Austin, Daniel F.},  year={1981},  month={Apr},  pages={291–295} }