@article{silveira_1995,  title={Petrosal approach: anatomical study and report of ten surgical cases of petroclival meningiomas},  volume={53},  ISSN={0004-282X},  url={https://doi.org/10.1590/S0004-282X1995000500026},  DOI={10.1590/S0004-282X1995000500026},  number={4},  journal={Arquivos de Neuro-Psiquiatria},  publisher={Academia Brasileira de Neurologia - ABNEURO},  author={Silveira, Roberto Leal},  year={1995},  month={Dec},  pages={849–849} }