@article{2012,  title={Cartas ao Editor},  volume={27},  ISSN={0102-7638},  url={https://doi.org/10.5935/1678-9741.20120084},  DOI={10.5935/1678-9741.20120084},  number={3},  journal={Brazilian Journal of Cardiovascular Surgery},  publisher={Sociedade Brasileira de Cirurgia Cardiovascular},  year={2012},  month={Jul},  pages={491–492} }