1. Control of human fetal heart rate during labour;Caldeyro-Barcia,1966
2. Effects of abnormal uterine contractions on fetal heart rate during labor;Caldeyro-Barcia,1967
3. Irregularities in R-R intervals;Bemmel,1969
4. Detection and processing of foetal electrocardiograms. A representative example for the processing of biological signals;Bemmel;Thesis,1969
5. Der Einfluss von Uteruskontraktionen auf den fetalen Herzrythmus;Haan,1969