1. Alfrey, A. C., Smythe, W. R.: Trace element abnormalities in chronic uremia. Ann. Contractors Conf. Artif. Kidney Natl. Arthritis Metabol. Digest. Dis. National Institute of Health, Bethesda, Maryland 1981, pp. 110–111.
2. Alfrey, A. C.: Trace element alterations in uremia. Proc. 8th Congr. Nephrol., 1982, pp. 1007–1013.
3. Burk, R. F., Whitney, R., Frank, H., Pearson, W. N.: Tissue selenium levels during the development of dietary liver necrosis in rats ted torula yeast diets.Ann. Nutr., 105, 96 (1968)
4. Burk, R. F.: Selenium in man. In: Prasad, A. S. (ed.): Trace Elements in Human Health and Diseases, Vol. 2. Academic Press, New York 1976, pp. 105–133.
5. Kallistratos, G., Evangelou, A., Donos, A.: Nutrition and cancer.Mater. Medica Greca, 12, 213 (1984).