1. American College of Obstetricians and Gynecologists: Clinical Management Guidelines For Obstetrician-Gynecologists: Antepartum Surveillance. Number 9, October1999.
2. Effects of hypoxemic events on breathing, body movements, and heart rate variation: A study in growth-retarded human fetuses;Bekedam;Am J Obstet Gynecol,1985
3. Improved outcome of twice weekly nonstress testing;Boehm;Obstet Gynecol,1986
4. Normal amniotic fluid volume changes throughout pregnancy;Brace;Am J Obstet Gynecol,1989
5. Qualitative assessment of uteroplacental bloodflow: Early screening test for high-risk pregnancies;Campbell;Obstet Gynecol,1986