A Comparison of Two-Dimen Echocard vs Carotid Duplex Scanning in Older Pts with Cerebral IschemiaArch Int Med 152:2089-2093, Voyce,S.J.,et al, 1992
Management of Cerebral Embolism of Cardiac OriginStroke 11:433-442, Easton,J.D.,et al, 1980