@article{article4e0c0590,
title   = {Longitudinal reference values for ductus venosus doppler in low-risk pregnancies},
author = {Marcolin, Alessandra C. and Berezowski, Aderson Tadeu and Crott, Gerson C. and Gonçalves, Carla V. and Duarte, Geraldo},
year = {2010},
journal   = {Ultrasound in Medicine and Biology}
}