1. Detection of fetal distress;Hon,1967
2. Fetal Heart Rate Patterns
3. Contraction stress test for antepartum fetal evaluation;Schifrin;Obstet. Gynecol,1975
4. A study of fetal heart rate acceleration patterns;Lee;Obstet. Gynecol,1975
5. Diagnostic management of chronic placental insufficiency;Kubli,1969