@article{bertin_pimentel_pompeia_2007,  title={Formalismo de Hamilton-Jacobi à la Carathéodory},  volume={29},  ISSN={1806-1117},  url={https://doi.org/10.1590/S1806-11172007000300012},  DOI={10.1590/S1806-11172007000300012},  number={3},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Bertin, M.C. and Pimentel, B.M. and Pompeia, P.J.},  year={2007},  pages={393–403} }