@article{krettli_1984,  title={Protective antibodies in Trypanosoma cruzi infections: detection, functional activity and possible mechanisms of trypomastigote killing in vivo and in vitro},  volume={79},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761984000500013},  DOI={10.1590/S0074-02761984000500013},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Krettli, Antoniana Ursine},  year={1984},  pages={59–65} }