1. Björkholm, B., Olling, S., Larsson, P., Hagberg, L.: An outbreak of diphtheria among Swedish alcoholics. Infection 1987, 15: 354–358.
2. Christenson, B., Böttiger, M.: Serological immunity to diphtheria in Sweden in 1978 and 1984. Scandinavian Journal of Infectious Diseases 1986, 18: 227–233.
3. Wiesmann, E., Keller, H. P., Steiner, P.: Die Diphtherie-impfung Erwachsener. Schweizerische medizinische Wochenschrift 1972, 102: 41–43.
4. Pappenheimer, A. M., Edsall, G., Lawrence, H. S., Banton, H. J.: A study of reactions following administration of crude and purified diphtheria toxoid in an adult population. American Journal of Hygiene 1950, 52: 353–370.
5. Larsen, K., Ullberg-Olsson, K., Ekwall, E., Hederstedt, B.: The immunization of adults against diphtheria in Sweden. Journal of Biological Standardization 1987, 15: 109–116.