@article{keel_prance_1979,  title={Studies of the vegetation of a white-sand black-water igapó (Rio Negro, Brazil)},  volume={9},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921979094645},  DOI={10.1590/1809-43921979094645},  number={4},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  author={Keel, Shirley H. Kuo and Prance, Ghillean T.},  year={1979},  month={Dec},  pages={645–655} }