1. Control of human fetal heart rate during labour;Caldeyro-Barcia,1966
2. Irregularities in R-R intervals;Bemmel,1969
3. Detection and processing of foetal electrocardiograms. A representative example for the processing of biological signals;Bemmel;Thesis,1969
4. Der Einfluss von Uteruskontraktionen auf den fetalen Herzrythmus;Haan,1969
5. van BemmelJ.H., B. Versteeg, A. F. L. Veth, L. A. M. Stolte, J. Janssens, T. K. A. B. Eskes. Quantitative evaluation of fetal heart rate patterns. I. Processing methods. Europ. J. Obst. Gynec.I, 95.