@article{cruz-reys_chavarin_arias_taboada_jímenez e._1989,  title={Actividad molusquicida del Piquerol A aislado de Piqueria trinervia (compositae) sobre ocho especies de caracoles pulmonados},  volume={84},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761989000100007},  DOI={10.1590/S0074-02761989000100007},  number={1},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Cruz-Reys, Alejandro and Chavarin, Carolina and Arias, Martha P. Campos and Taboada, Javier and Jímenez E., Manuel},  year={1989},  month={Jan},  pages={35–40} }