Hyperdense Basilar Artery Sign on Unenhanced CT Predicts Thrombus and Outcome in Acute Posterior Circulation StrokeStroke 40:134-139, Goldmakher,G.V.,et al, 2009
Vertebrobasilar DiseaseNEJM 352:2618-2626, Savitz,S.I.&Caplan,L.R., 2005