@article{moitinho_bértoli_guedes_ferreira_1999,  title={Influence of Refrigeration and Formalin on the Floatability of Giardia duodenalis Cysts},  volume={94},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761999000400025},  DOI={10.1590/S0074-02761999000400025},  number={4},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Moitinho, Maria da Luz Ribeiro and Bértoli, Marta and Guedes, Terezinha Aparecida and Ferreira, Cláudio Santos},  year={1999},  month={Jul},  pages={571–574} }