@article{marcus_1963,  title={On brazilian supralittoral and brackish water snails},  volume={13},  ISSN={0373-5524},  url={https://doi.org/10.1590/S0373-55241963000200004},  DOI={10.1590/S0373-55241963000200004},  number={2},  journal={Boletim do Instituto Oceanográfico},  publisher={Instituto Oceanográfico da Universidade de São Paulo},  author={Marcus, Ernst},  year={1963},  pages={41–52} }