Intracranial Angioplasty:Experience and Complications
AJNR 18:1661-1668, Takis,C.,et al, 1997
Carotid Artery Vasospasm Complicating Extensive Skull Base Surgery: Cause, Prevention, and Management
Otolaryngol Head Neck Surg 97:1-7, Smith, P.G. & Killeen, T.E., 1987