@article{barrientos_1929,  title={El concepto Indice Delta en la determinación del valor funcional de los riñores},  volume={22},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761929000200002},  DOI={10.1590/S0074-02761929000200002},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Barrientos, Luis Prado},  year={1929},  pages={10–16} }