1. The European Agency for the Evaluation of Medicinal Products (EMEA). Committee for proprietary medicinal products (CPMP). Note for guidance on clinical investigation of steroid contraceptives in women. 17 February 2000 CPMP/EWP/519/98
2. Safety of modern oral contraceptives;Crook;Contraception,1998
3. The effect of progestins on plasma lipids;Tikkanen,2000
4. HDL and arteriosclerosis;Nofer;Atherosclerosis,2002
5. The rationale for a wider range of progestogens;Skouby;Climacteric,2000