1. Roux, J. R.: Pitfalls of electronic fetal monitoring, in: Queenan, J. T., editor: Management of High Risk Pregnancy, Oradell, New Jersey, 1980, Medical Economics Co.
2. Human fetal heart rate change and movement in response.to sound and vibration;Grimwade;Am. J. Obstet. Gynecol.,1971
3. Fetal response to external light stimulus;Polishuk;Harefuah,1975
4. Fetal heart rate response to scalp blood sampling;Clark;Am. J. Obstet. Gynecol.,1982
5. Foetal capillary pH as an indicator of the condition of the foetus;Beard;J. Obstet. Gynaecol. Br. Commonw.,1967