@article{kepler_2003,  title={Carta de Johannes Kepler a Michael Mästlin em Tübingen},  volume={1},  ISSN={1678-3166},  url={https://doi.org/10.1590/S1678-31662003000200006},  DOI={10.1590/S1678-31662003000200006},  number={2},  journal={Scientiae Studia},  publisher={Universidade de São Paulo, Departamento de Filosofia},  author={Kepler, Johannes},  year={2003},  month={Apr},  pages={207–215} }