CT and Hemifacial SpasmNeurol 38:1111-1113, Digre,K.B.,et al, 1988
Basilar Artery Stenosis:Middle & Distal SegmentsNeurol 37:1742-1746, Pessin,M.S.,et al, 1987
"Top of the Basilar"SyndromeNeurol 30:72-79, 1980, Caplan,L.R., 1980