@article{sá_carvalho_2017,  title={Miocene fern spores and pollen grains from the Solimões Basin, Amazon Region, Brazil},  volume={31},  ISSN={0102-3306},  url={https://doi.org/10.1590/0102-33062017abb0160},  DOI={10.1590/0102-33062017abb0160},  number={4},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Sá, Natália de Paula and Carvalho, Marcelo de Araújo},  year={2017},  month={Oct},  pages={720–735} }