1. The simultaneous use of refampicin and other antituberculous agents with oral contraceptives;Reimers;Prax Klin Pneumol,1971
2. Interactions between OCs and other drugs;Breckenridge;Pharmacol Ther,1979
3. Drug interaction with OCs;Dossetor;Br Med J,1975
4. Medikamentose enzyminduktion und hormonale kontrazeption;Hempel;Zentralbl Gynaekol,1973
5. The effect of ampicillin on OC effectiveness;Friedman;Obstet Gynecol,1980