1. Fetal Heart Rate Patterns;American College of Obstetricians and Gynecologists,1995
2. Electronic fetal monitoring in the United States in the 1980's;Albers;Obstetrics and Gynecology,1993
3. Late fetal heart decelerations and changes in cerebral oxygenation during the first stage of labour;Aldrich;British Journal of Obstetrics and Gynaecology,1995
4. Safety of full term birth;Amiel-Tison,1994