1. New doppler technique for assessing uteroplacental blood flow;Campbell;Lancet,1983
2. Uteroplacental vascular pathology;Robertson;Eur J Obstet Gynecol Reprod Biol,1975
3. Qualitative assessment of uteroplacental blood flow: early screening test for high nsk pregnancies;Campbell;Obstet Gynecol,1986
4. Doppler ultrasound (commentary);Neilson;Br J Obstet Gynaecol,1987
5. Duplex ultrasound: Vision on, sound on;Lancet,1986