1. An atlas of fetal heart rate patterns;Hon,1968
2. Foetal heart frequency and perinatal condition of the foetus and newborn;Hammacher;Gynaecologia,1968
3. Control of human fetal heart rate during labor;Caldeyro-Barcia,1966
4. Fetal heart rate variability—regulatory mechanisms;Martin,1984
5. Fetal heart rate variability;Parer,1984