1. A comparison of angiography, intravenous digital subtraction angiography and duplex ultrasound in the diagnosis of carotid artery atherosclerosis;D'Alotto, C.; Pelz, D.M.; Rankin, R.N.;J CanAssocRadiol,1985
2. Digital angiography in pulmonary embolism;Bjork, L.;Acta RadiologicaDiagnostica,1986