1. Corrosion of copper in utero;Kosonen, A.,1980
2. Intrauterine contraception: past present and future;Wagner, H.,1999
3. Copper loss from copper IUDs;Chantler, E.N.,1984
4. Threeyear efficacy and acceptability of the GyneFix®;Cao, X.; Zhang, W.; Zhao, X.; Lin, N.; Wang, L.; Li, C.;Contraception,2004
5. Assessment of menstrual blood loss in Belgian users of the frameless copper-releasing IUD with copper surface area;Wildemeersch, D.; Rowe, P.J.;Contraception; mm2 and users of a copperlevonorgestrel-releasing intrauterine system,2004