1. Fetal cardiovascular response to distress;Goodlin;Obstet Gynecol,1977
2. Fetal heart frequency and perinatal condition of fetus and newborn;Hammacher;Gynecologia,1968
3. Observations on heart rate and pH in the human fetus during labour;Kubli;Am J Obstet Gynecol,1969
4. Fetal activity acceleration determination for the evaluation of fetal reserve;Lee;Obstet Gynecol,1976
5. Non-stressed FHR monitoring in the antepartum period;Rocard;Am J Obstet Gynecol,1976