1. Absence of one umbilical artery and its relationship to congenital malformation;Adler;Harefuah,1963
2. Nomograms for precise determination of birth weights for dates;Altman;Br. J. Obstet. Gynaecol.,1980
3. A vascular anomaly of the umbilical cord: the absence of one umbilical artery in the umbilical cords of normal and abnormal fetuses;Benirschke;Obstet. Gynecol.,1955
4. Major pathologic features of the placenta, cord and membranes;Benirschke;Birth Defect Series,1965
5. The Pathology of the Human Placenta;Benirschke,1967