1. A new form of intrauterine contraceptive device;Osler;Am. J. Obstet. & Gynec.,1968
2. Intrauterine contraception with a new Antigon model, and investigation of the mechanism of action of intra-uterine devices;Lebech;Danish Med. Bull.,1971
3. Social factors in use and effectiveness of the IUD;Snowden,1971
4. Contraception with intrauterine devices;Tietze;Am. J. Obstet. & Gynec.,1966
5. Mechanism of action of intrauterine contraceptives in women;Davis;Obstet. & Gynec.,1970