1. The pathology of the human placenta;Benirschke,1967
2. Diagnosis of twin-twin transfusion syndrome at 18 weeks gestation;Elajalde;JCU,1983
3. Antenatal diagnosis of twin transfusion syndrome by ultrasound;Wittman;Obstet Gynecol,1981
4. Feto-fetal transfusion syndrome: prenatal ultrasound diagnosis;Brennan;Radiology,1982