Reference Values for Blood Flow Velocity in the Uterine Artery in Normal Pregnancies from 18 Weeks to 42 Weeks of Gestation Calculated by Automatic Doppler Waveform Analysis - Bahlmann, F.; Fittschen, M.; Reinhard, I.; Wellek, S.; Steiner, E. (Ultraschall in der Medizin - European Journal of Ultrasound, 2012)