1. Pre-operative cervical dilatation by small doses of prostaglandin F2;Andriesse;Contraception,1976
2. Interception. Post-coital estrogens in 3016 women;Haspels;Contraception,1976
3. Effet d'un steroide anti-progestérone chez la femme: interruption du cycle menstruel et de la grossesse au debut;Herrman;Comptes Rendus Acad. Sci. Paris,1982
4. Termination of very early pregnancy by RU 486—an antiprogestational compound;Kovacs;Contraception,1984
5. Comparative randomized double blind study high dosage ethinyl-estradiol versus eth-estradiol-norgestrel combination in post coital hormonal contraception;Van Santen;Contrac. Deliv. Syst.,1983