Carotid Transient Ischemic Attacks and Normal Investigations:A Follow-up StudyStroke 21:525-527, Shuaib,A.&Hachinski,V.C., 1990
Transient Ischemic Attacks and Normal Cerebral Angiograms:A Follow-up StudyStroke 19:1223-1228, Shuaid,A.,et al, 1988