1. OCs-Update on usage, safety, and side effects;Rinehart;Population Reports,1979
2. Contraception with a normophasic agent;Kopera;Wien Med.,1977
3. Endometrial carcinoma in women under 40 years of age: comparison of OC users and non-users;Silverberg;Cancer,1977
4. Clinical evaluation of two biphasic and one triphasic norgestrel EE regimens;Larranga;Int. J. Fert.,1978
5. Metabolic effects of steroid contraceptives;Briggs;Advances in Steriod Biochemistry and Pharmacology,1970