1. General Practitioniers Oral Contraception Study (iroup. Further analyses of'mortality in oral contraceptive users;of, Royal College;Lancet,1981
2. Epidemiology of hepatocellular adcnoma. 'I'he role of oral contraceptive use;Rooks, J.B.; Dry, H.W.; Ishak, K.G.;JAMA,1979
3. Cancer of the liver and the use of' oral contraceptives;Forman 1), V'incent TJ, Doll R;Br. Iled7
4. Vessev MP'. Female hormones and vascular disease-an epidcmiological overview. BritiihJ7ournal ofFamilyP 'lanning,1980
5. Carcinoma of' the cervix and oral contraceptisesepidemiological studies;Vessev, M, (irice D;Biomed Pharmacother,1989