*(EN) Bernardo A, Philip Stieg, "Orbitocranial Zygomatic Approach for Upper Basilar Artery Aneurysms", Capitolo 11 in: Mcdonald RL, "Neurosurgical Operative Atlas: Vascular Neurosurgery", 2nd ed., New York, NY: Thieme Verlagsgruppe, 2009. 