1. Transvaginal Doppler assessment of the foetal cerebral circulation;Lewinsky;Obstet Gynecol,1991
2. Ultrasonography correlates with criteria for ventriculo-peritoneal shunting;Chadduck;Surg Neurol,1989
3. Doppler studies of foetal cerebral blood flow;Degani;Ultrasound Obstet Gynecol,1994
4. Current concepts in neonatal cranial Doppler sonography;Taylor;Ultrasound Q,1992
5. Duck FA, Henderson J. Acoustic output of modern ultrasound equipment: is it increasing? In: Barnett SB, Kossoff G, editors. Safety of diagnostic ultrasound. Progress in obstetric and gynecological sonography series. London: Parthenon Press, 1997:15–26.