Figueras, Francesc, Elisenda Eixarch, Eva Meler, et al. "Umbilical artery Doppler and umbilical cord pH at birth in small-for-gestational-age fetuses: valid estimate of their relationship" Journal of Perinatal Medicine, 33.3 (2005): 219-225. Retrieved 24 May. 2013, from doi:10.1515/JPM.2005.040

Figueras, F., Eixarch, E., Meler, E., et al. (2005). Umbilical artery Doppler and umbilical cord pH at birth in small-for-gestational-age fetuses: valid estimate of their relationship. Journal of Perinatal Medicine, 33(3), pp. 191-266. Retrieved 24 May. 2013, from doi:10.1515/JPM.2005.040

Figueras, Francesc, Elisenda Eixarch, Eva Meler, et al. 2005. Umbilical artery Doppler and umbilical cord pH at birth in small-for-gestational-age fetuses: valid estimate of their relationship. Journal of Perinatal Medicine. 33(3): 191-266. Retrieved 24 May. 2013, from doi:10.1515/JPM.2005.040