@article{ayres_1993,  title={Objeto da epidemiologia e nós},  volume={3},  ISSN={0103-7331},  url={https://doi.org/10.1590/S0103-73311993000100003},  DOI={10.1590/S0103-73311993000100003},  number={1},  journal={Physis: Revista de Saúde Coletiva},  publisher={PHYSIS - Revista de Saúde Coletiva},  author={Ayres, José Ricardo de C.M.},  year={1993},  pages={55–76} }