1. An intravaginal contraceptive diaphragm made of collagen sponge: New old principle;Chvapil;Fert. Steril.,1976
2. The acceptance of the collagen sponge diaphragm as an intravaginal contraceptive in human volunteers;Chvapil;Fert. Steril.,1976
3. Process for the production of collagen fiber fabrics in the form of felt-like membranes or sponge-like layers;Chvapil,1974
4. Relative antifertility activity of three vaginal contraceptive products in the rabbit: relationship to invitro data;Homm;Contraception,1976
5. Contraceptive Means;Forti,1973