@article{paraense_pointier_2003,  title={Physa acuta Draparnaud, 1805 (Gastropoda: Physidae): a study of topotypic specimens},  volume={98},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02762003000400016},  DOI={10.1590/S0074-02762003000400016},  number={4},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Paraense, W Lobato and Pointier, Jean-Pierre},  year={2003},  month={Jun},  pages={513–517} }