1. in: Proc. Int. Conf. on Semiconducting Materials, Reading (1950), edited by H. K. Henisch (Butterworths Scientific Publications, London, 1951), p. 172.
2. Zinc Oxide Rediscovered, The New Jersey Zinc Company, New York (1957) and Zinc Oxide, Properties and Applications (1976).
3. Electronic Processes in Zinc Oxide
4. Freie und gebundene Exzitonen in ZnO, Habilitation Thesis, Erlangen (1975).