@article{sousa_1983,  title={Surface electrical charge of bloodstream trypomastigotes of Trypanosoma cruzi strains},  volume={78},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761983000400014},  DOI={10.1590/S0074-02761983000400014},  number={4},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Sousa, Maria Auxiliadora de},  year={1983},  month={Oct},  pages={497–500} }