1. IUD use throughout the world: past, present, and future;Maudlin;Contraception,1992
2. K Trieman L Liskin A Kols W Rinehart IUDs, an update. Population Reports. Series B, No 6, 1995.
3. Current trends in the diagnosis and treatment of tuboovarian abscess;Landers;Am J Obstet Gynecol,1985
4. Bacterial flora of the cervix in women using different methods of contraception;Haukkamaa;Am J Obstet Gynecol,1985
5. Fertility after contraception or abortion;Huggins;Fertil Steril,1990