Azevedo, S Abdominal-lead fetal electrocardiographic R-wave enhancement for heart rate determination. [electronic resource] - IEEE transactions on bio-medical engineering May 1980 - 255-60 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0018-9294 Standard No.: 10.1109/TBME.1980.326631 doi Subjects--Topical Terms: Analog-Digital ConversionElectrocardiography--methodsFetal Heart--physiologyFetal Monitoring--methodsForecastingHeart RateHumansImage Enhancement