Agenesis of the Left Internal Carotid Artery Associated with Right Anterior Cerebral Artery A1 Segment Bifurcation Aneurysm: A Case Report - Demirgil, B; Tuğcu, B; Günaldi , Ö; Postalcı, L; Günal, M; Tanrıverdi, O (min - Minimally Invasive Neurosurgery, 2007)