@article{barth_1960,  title={Ueber die pygidialdruese von enhydrus sulcatus (Wied., 1821) (Coleoptera, Gyrinidae)},  volume={58},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761960000200001},  DOI={10.1590/S0074-02761960000200001},  number={2},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Barth, Rudolf},  year={1960},  month={Nov},  pages={135–147} }