@article{soares_cruz_2007,  title={Severe digital ischemia due to systemic sclerosis successfully treated with bosentan: case report},  volume={6},  ISSN={1677-5449},  url={https://doi.org/10.1590/S1677-54492007000300011},  DOI={10.1590/S1677-54492007000300011},  number={3},  journal={Jornal Vascular Brasileiro},  publisher={Sociedade Brasileira de Angiologia e de Cirurgia Vascular (SBACV)},  author={Soares, Cesar José Guimarães and Cruz, Boris A.},  year={2007},  month={Sep},  pages={276–279} }