@article{villela_hargreaves_1945,  title={Estudos sobre a dosagem microbiologica das vitaminas do complexo B - II. Niacina},  volume={42},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761945000100013},  DOI={10.1590/S0074-02761945000100013},  number={1},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Villela, Gilberto G. and Hargreaves, Alberto B.},  year={1945},  month={Feb},  pages={183–190} }