1. Benign tumors of the liver;Ishak;Med Clin North Am,1975
2. Tumors of the liver;Dawson,1974
3. Increased risk of hepatocellular adenoma in women with long term use of oral contraception;Center For Disease Control;CDC Morbidity Mortality Wkly Rep,1977
4. Hepatic tumors: possible early relationship to use of oral contraceptives;Klatskin;Gastroenterol,1977