@article{charlwood_1996,  title={Biological variation in Anopheles darlingi root},  volume={91},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761996000400001},  DOI={10.1590/S0074-02761996000400001},  number={4},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Charlwood, JD},  year={1996},  month={Jul},  pages={391–398} }