@article{descartes_2010,  title={A dióptrica: discursos I, II, III, IV e VIII},  volume={8},  ISSN={1678-3166},  url={https://doi.org/10.1590/S1678-31662010000300007},  DOI={10.1590/S1678-31662010000300007},  number={3},  journal={Scientiae Studia},  publisher={Universidade de São Paulo, Departamento de Filosofia},  author={Descartes, René},  year={2010},  month={Sep},  pages={451–486} }