@inproceedings{inproceedings648bf4ac, title = {Acesso presigmoideo a regiao petroclival}, author = {Vellutini, E A S and Siqueira, M and Velasco, O L S P and Moraes, O J S and Marino JĂșnior, Raul}, year = {1992}, booktitle = {Congresso Brasileiro de Neurocirurgia} }