1. Tubal sterilization in the United States, 1994–1996;MacKay;Fam Plann Perspect,2001
2. Female sterilization: a centennial conference;Wulf;Fam Plann Perspect,1981
3. Walker v. Pierce 46, USLW 2069.
4. Standards for Obstetric–Gynecologic Hospital Services;American College of Obstetricians and Gynecologists (ACOG), Committee on Professional Standards,1985