1. Sivin I, Greenslade F, Schmidt F, Waldman SN. The Copper T 380 intrauterine device: a summary of scientific data. New York: The Population Council, 1992.
2. IUD use throughout the world;Mauldin,1994
3. The Copper T 380 IUD;Schmidt,1994
4. A randomized comparative study of the TCu-380A and Cu-Safe 300 IUDs;Van Kets;Advanc Contracept,1995
5. Performance of the TCu-380A and Cu-Fix IUDs in an international randomized trial;Rosenberg;Contraception,1996