@article{sena_2020,  title={“El defensor de la frontera”: a trajetória de Sebastián Ramos e as disputas fronteiriças (Brasil-Bolívia, 1825-1862)},  volume={26},  ISSN={1413-7704},  url={https://doi.org/10.1590/TEM-1980-542X2019v260105},  DOI={10.1590/TEM-1980-542X2019v260105},  number={1},  journal={Tempo},  publisher={EdUFF - Editora da UFF},  author={Sena, Ernesto Cerveira de},  year={2020},  month={Jan},  pages={92–122} }