American College of Obstetricians and Gynecologists. ACOG technical bulletin (1995). „Fetal heart rate patterns: Monitoring, interpretation, and management”. Int J Gynecol Obstet. 51: 65—74. doi:10.1016/0020-7292(95)80014-4.
.
Hill Christopher Rowland, Bamber Jeff C, & Ter Haar GR (2004). „Physical principles of medical ultrasonics.”. The Journal of the Acoustical Society of America. 116 (5): 2707. doi:10.1121/1.4809374.CS1 одржавање: Вишеструка имена: списак аутора (веза)
Miller, David A.; Miller, Lisa A. (2012). „Electronic fetal heart rate monitoring: Applying principles of patient safety”. American Journal of Obstetrics & Gynecology[Internet]. 206 (4): 278—83. doi:10.1016/j.ajog.2011.08.016..
Noren, H.; Luttkus, A. K.; Stupin, J. H.; et al. (2007). „Fetal scalp pH and ST analysis of the fetal ECG as an adjunct to cardiotocography to predict fetal acidosis in labor – multicenter, case control study”. J Perinat Med. 35 (5): 408—14. PMID17685855. doi:10.1515/JPM.2007.097..
Noren, H.; Luttkus, A. K.; Stupin, J. H.; et al. (2007). „Fetal scalp pH and ST analysis of the fetal ECG as an adjunct to cardiotocography to predict fetal acidosis in labor – multicenter, case control study”. J Perinat Med. 35 (5): 408—14. PMID17685855. doi:10.1515/JPM.2007.097..
Royal College of Obstetricians and Gynaecologists (RCOG). The Use of Electronic Fetal Monitoring. Evidence-based Clinical Guideline Number 8, Royal College of Obstetricians and Gynaecologists 2001. [1]Архивирано на сајту Wayback Machine (4. јануар 2020)
web.archive.org
Royal College of Obstetricians and Gynaecologists (RCOG). The Use of Electronic Fetal Monitoring. Evidence-based Clinical Guideline Number 8, Royal College of Obstetricians and Gynaecologists 2001. [1]Архивирано на сајту Wayback Machine (4. јануар 2020)