1. (1990). Birth Defects Encyclopedia, Oxford: Blackwell Scientific Publications.
2. (1983). Color Atlas of Life Before Birth: Normal Fetal Development, Chicago Yearbook Medical.
3. , , , . (1988). Prenatal Diagnosis of Congenital Anomalies. San-Mateo, CA: Appleton & Lange, 274–277.
4. A close look at early embryonic development with the high-frequency transvaginal transducer