1. Fruherkennung intrauteriner Gefahrenzustände durch Elektrophonokardiographie und Tokographie;Hammacher,1966
2. Fetal activity acceleration determination for evaluation of fetal reserve;Lee;Obstet. Gynecol.,1976
3. Fetal heart rate acceleration in relation to the oxytocin challenge test;Farahani;Obstet. Gynecol.,1977
4. Antepartum fetal heart rate and uterine activity studies. I. Preliminary report of accelerations and the oxytocin challege test;Fox;Am. J. Obstet. Gynecol.,1976