1. Recent studies in intrauterine devices: a reappraisal;Snowden;J Biosoc Sci,1975
2. Metallic copper as an intrauterine contraceptive agent;Tatum;Am J Obstet Gynecol,1973
3. Binnen-baarmoederlijke Boorbehoemiddelen met Koper, de Combined Multiload Copper IUD (MLCu 250);Van Os;Ned Tijdschr Geneeskd,1977
4. Thiery M, Van Der Pas H, Van Os W, Van Kets H: Unpublished data
5. Report on the use of the Dalkon Shield intrauterine device;Sadovsky;Contraception,1974