Transcranial Doppler Sonography
Arch Neurol 51:1054-1056, 10591994., Wechsler,L.R.&Babikian,V.L., 1994
Cerebral Air Embolism:Report of Five Cases & Review of the Literature
Arch Neurol 34:168. 1977, Menkin,M.,et al, 1977
Occlusive Cerebrovascular Disease
Am J Med 30:577, Meyer,J.S., 1961