@article{gross_schell_molina_leão_strack_1989,  title={The impact of improvement of water supply and sanitation facilities on diarrhea and intestinal parasites: a Brazilian experience with children in two low-income urban communities},  volume={23},  ISSN={0034-8910},  url={https://doi.org/10.1590/S0034-89101989000300006},  DOI={10.1590/S0034-89101989000300006},  number={3},  journal={Revista de Saúde Pública},  publisher={Faculdade de Saúde Pública da Universidade de São Paulo},  author={Gross, Rainer and Schell, Bernd and Molina, Maria Carmen Bisi and Leão, Maria Antonia Cuelho and Strack, Ulrike},  year={1989},  month={Jun},  pages={214–220} }