1. Arnold, W. The significance of hepatitis B infection in drug addicts. In:Krugman, S., Sherlock, S. (eds.): Proceedings of the European Symposium on Hepatitis B. Merck Sharp & Dohme International, Rahway, NJ 1981, pp. 75–82.
2. Szmuness, W., Dienstag, J. L., Purcell, R. H., Harley, E. J., Stevens, C. E., Wong, D. C. Distribution of antibody to hepatitis A antigen in urban adult populations. N. Engl. J. Med. 295 (1976) 755–759.
3. Gust, I. D., Lehmann, N. I., Lucas, C. R., Ferris, A. A., Locarnini, S. A. Studies on the epidemiology of hepatitis A in Melbourne. In:Vyas, G. N., Cohen, S. N., Schmid, R. (eds.): Viral hepatitis. Franklin Institute Press, Philadelphia 1978, pp. 105–112.
4. Mathiesen, L. R., Skinhøy, P., Hardt, F., Nilsen, J. O., Sloth, K., Zoffmann, H., Møller, A. M., Wong, D. C., Purcell, R. H. and theCopenhagen Hepatitis Acuta Programme Epidemiology and clinical characteristics of acute hepatitis types A, B and non-A, non-B. Scand. J. Gastroenterol. 14 (1979) 849–856.
5. Widmer, U. K., Villaverde, A., Grob, P. J. Hepatitisepidemiologie 1977 bis 1979. Schweiz. Med. Wschr. 110 (1980) 930–937.