1. On the proliferation of the squamous epithelium on the portio vaginalis uteri;Rubinstein;Acta Obstet. et Gynec. Scand.,1966
2. Suppression of fertility by intrauterine copper and zinc in rabbits: A new approach to intrauterine contraception;Zipper;Amer. J. Obstet. Gynec.,1969
3. Human fertility control through the use of endouterine metal antagonisms of trace elements;Zipper,1971
4. Contraception through the use of intrauterine metals. I. Copper as an adjunct to the ‘T’ device;Zipper;Amer. J. Obstet. Gynec.,1971
5. Chemical reactions of the copper intrauterine device;Oster;Fertil. & Steril.,1972