1. Kühn, H. A., Wernze, H.: Klinische Hepatologie, Thieme-Verlag, Stuttgart (1979)
2. Kitani, (Ed.): Liver and aging. Elsevier Biomedical, Amsterdam (1982)
3. Piatt, D. (Ed.): Liver and aging. Schattauer-Verlag, Stuttgart (1977)
4. James, O. F. W.: Gastrointestinal and liver function in old age. Lusowsky, M. S. (Ed.): Clinics in Gastroentology, Vol. 12 (1983), Saunders, Philadelphia.
5. Einarsson, K., Nielsill, K., Leijd, B., Angelin, B.: Influence of age on secretion of cholesterol and synthesis of bile acids by the liver. New Engl. J. Med., 313, 277–282 (1985)