1. Menstrual bleeding with intrauterine contraceptive devices;Guttorm;Acta Obstet. Gynec. Scand.,1971
2. Menstrual blood loss during oral contraceptive therapy and in I.U.D users;Hefnawi;Egypt. Pop. Family Plan. J.,1970
3. The “T” intrauterine contraceptive device and recent advances in hormonal anticontraceptional therapy;Tatum,1968
4. Contraception through the use of intrauterine metals. I. Copper as an adjunct to the T device;Zipper;Am. J. Obs. & Gynec.,1971
5. The copper T contraceptive system. A review of relevant laboratory and clinical data and recommended procedure for insertion;Tatum,1972