1. Bihr E, Rohmer P, Weill F (1979) Petit atlas d’échoanatomie normale de l’étage supérieur de l’abdomen, vol 1. Doin, Paris
2. Bolondi L, Gandolfi L, Arienti V, Caletti GC, Corcioni E, Gasbarrini G, Lalo G (1982) Ultrasonography in the diagnosis of portal hypertension. Diminished response of portal vessels to respiration. Radiology 142: 167–172
3. Burcharth F, Rasmussen SN (1974) Localization of the porta hepatis by ultrasonic scanning prior to percutaneous transhepatic portography. Br J Radiol 47: 598–600
4. Callen PW, Filly RA, Sarti DA, Sample WF (1979) Ultrasonography of the diaphragmatic crura. Radiology 130: 721–724
5. Goldberg BB, Ostrum BJ, Isard H (1966) Ultrasonic aortography. JAMA 124: 119–124