1. A new low-dose biphasic combination: comparison with conventional estrogen-progestogen pills and with pills containing 30 micrograms of ethinyl estradiol;Belaisch;Rev Fr Gynecol Obstet,1977
2. Clinical and biochemical investigations of a variable dose combined type oral contraceptive;Briggs;Curr Med Res Opin,1977
3. A new estro-progestagen contraceptive: two-stage mini-dose;Soutoul;Sem Hop Ther,1977
4. The phasic approach to oral contraception: the triphasic concept and its clinical application;Upton;Int J Fertil,1983
5. Rationale for a triphasic oral contraceptive;Pasquale;J Reprod Med,1984