3Ratanakom D, Yunis C, Ferranio CM, et al. Noninvasive ultrasound evaluation of the vertebral artery in hypertension. Neuroimaging, 2002,12 (2) : 158-163.
4Mercado R, Santos F J, Ortiz Vl, et al. Vascular anatomy of the foramen of Vicq d'Azyr: a microsurgical perspective. Minim Invasive Neurosurgery,2004,47(2) : 102-106.
