1. British Obstetric and Gynaecological Practice;Baird, D.; Walker, J.,1959
2. The incidence and prognostic implications of congenital absence of one umbilical artery;Benirschke, K.; Bourne, G.L.;Amer. J. Obstet. Gynec,1960
3. A vascular anomaly of the umbilical cord;Benirschke, K.; Bourne, G.L.; Brown, W.H.;Obstet. Gynec,1955
4. The Human Amnion, Chorion and Umbilical Cord;Boume, G.L.,1961
5. On the abnormalities of the umbilical cord which may cause antenatal death;Browne, F.J.;J. Obstet. Gynaec. Brit. Emp,1925