1. Transnasal endoscopic-assisted surgery of the skull base;Stamm,2005
2. The transoral approach to the base of the brain and upper cervical cord;Crockard;Ann R Coll Surg Engl,1985
3. Endonasale chirurgie von tumoren der nasennebenhohlen und rhinobasis;Draf;Med Bild Dienst,1995
4. Anterior midline approaches to the central skull base;Harsh;Clin Neurosurg,1996
5. Endoscopic endonasal approach to the cavernous sinus. An anatomical study;Alfieri;Neurosurgery,2001