1. Developments of principles of transcranial Doppler;Aaslid,1992
2. The detection of cerebral emboli using Doppler ultrasound;Russell,1992
3. Detection of cerebral arterial emboli;Spencer,1992
4. Anatomy and freehand examination techniques;Fujioka,1992
5. Bends: detection of circulating gas emboli with external sensors;Gillis;Science,1968