Working area and angle of attack in three cranial base approaches: pterional, orbitozygomatic, and maxillary extension of the orbitozygomatic approach - Gonzalez, L F; Crawford, N R; Horgan, M A; Deshmukh, P; Zabramski, J M; Spetzler, R F (Neurosurgery, 2002)
, discussion 555–557