@article{brassac_ludwig_2003,  title={Fragilariaceae (Bacillariophyceae) de rios da bacia do Iguaçu, Estado do Paraná, Brasil},  volume={26},  ISSN={0100-8404},  url={https://doi.org/10.1590/S0100-84042003000300004},  DOI={10.1590/S0100-84042003000300004},  number={3},  journal={Brazilian Journal of Botany},  publisher={Sociedade Botânica de São Paulo},  author={Brassac, Nicole M. and Ludwig, Thelma A.V.},  year={2003},  month={Jul},  pages={311–318} }