TY  - RPRT
TI  - Comparison of correlation and modulus difference processing algorithms for the determination of foetal heart rate from ultrasonic Doppler signals.
AU  - G K Manning
AU  - J H Dripps
PY  - 1986
DO  - 10.1007/bf02443924
UR  - https://pubmed.ncbi.nlm.nih.gov/3520175/
ID  - 3520175
ER  -