@article{ramírez-zamora_biller_2009,  title={Brainstem cavernous malformations: a review with two case reports},  volume={67},  ISSN={0004-282X},  url={https://doi.org/10.1590/S0004-282X2009000500030},  DOI={10.1590/S0004-282X2009000500030},  number={3b},  journal={Arquivos de Neuro-Psiquiatria},  publisher={Academia Brasileira de Neurologia - ABNEURO},  author={Ramírez-Zamora, Adolfo and Biller, José},  year={2009},  month={Sep},  pages={917–921} }