Ammirati, M A combined intradural presigmoid-transtransversarium-transcondylar approach to the whole clivus and anterior craniospinal region: anatomic study. [electronic resource] - Skull base surgery 1993 - 193-200 p. digital Publication Type: Journal Article ISSN: 1052-1453 Standard No.: 10.1055/s-2008-1060584 doi