1. Prevention of Rh D isoimmunization;American College of Obstetricians,1999
2. Recent advances in the Rh problem;Freda;Trans N Engl Obstet Gynecol Soc,1964
3. Fetal erythrocytes in maternal circulation after spontaneous abortion;Litwak;JAMA,1970
4. Transplacental haemorrhage in induced abortion;Murray;Lancet,1972
5. Role of induced abortion in rhesus immunization;Queenan;Lancet,1971