@article{tryon_conant_1975,  title={The Ferns of Brazilian Amazonia},  volume={5},  ISSN={0044-5967},  url={https://doi.org/10.1590/1809-43921975051023},  DOI={10.1590/1809-43921975051023},  number={1},  journal={Acta Amazonica},  publisher={Instituto Nacional de Pesquisas da Amazônia},  author={Tryon, Rolla M. and Conant, David S.},  year={1975},  month={Apr},  pages={23–34} }