References
- Goodlin R C. History of fetal monitoring. Am J Obstet Gynecol 1972; 33: 323–352
- Lindsley D B. Heart and brain potentials of human fetuses in utero. Am J Psychol 1942; 55: 412–416
- American College of Obstetrics and Gynecologists. Antepartum fetal surveillance. American College of Obstetrics and Gynecologists, Washington, DC 1994, ACOG technical bulletin no. 188
- Jenkins H ML. Technical progress in fetal electrocardiography — a review. J Perinat Med 1986; 14: 365–370
- Cohen D. Magnetoencephalography: detection of the brain's electrical activity with a superconducting magnetometer. Science 1972; 175: 664–666
- Willamson S J, Romani G L, Kaufman L. Biomagnetism: an interdisciplinary approach. Plenum Press, New York 1983
- Elberling C, Bak C, Kofoed B, Lebech J, Saermark K. Magnetic auditory responses of the human brain. A preliminary report. Scand Audiol 1980; 9: 185–190
- Blum T, Saling E, Bauer R. First magnetoencephalographic recordings of the brain activity of the human fetus. Br J Obstet Gynaecol 1985; 92: 1224–1229
- Wakai R T, Leuthhold A C, Martin C B, Jr. Fetal auditory evoked responses detected by magnetoencephalography. Am J Obstet Gynecol 1996; 174: 1484–1486
- Scheer K, Nubar J. Variation of fetal presentation with gestational age. Am J Obstet Gynecol 1976; 125: 269–270
- Frost O L. An algorithm for linearly constrained adaptive array processing. Proceedings of the Institute of Electrical and Electronics Engineers 1972; 60: 926–935