1. Alvares, O., Skougaard, M. P., Pindborg, J., Roed-Petersen, B.: In vitro incorporation of tritiated thymidine in oral homogenous leukoplakias. Scand. J. Dent. Res. 80, 510?514 (1972)
2. Brody, I.: The epidermis. In: Jadassohn's Handb. Haut-u. Geschlechtskrankheiten, Ergänz.-Werk. Gans, O., Steigleder, G. K. (Hrsg.), I/1, pp. 1?142. Berlin, Heidelberg, New York: Springer 1968
3. Christophers, E., Laurence, E. B.: Kinetics and structural organisation of the epidermis. In: Current problems in dermatology, Vol. 6, pp. 87?106. Basel, München, Paris, London, New York Sidney: S. Karger 1976
4. Christophers, E., Braun-Falco, O.: Psoriatic hyperplasia: some measurements. Br. J. Dermatol. 83, 63?68 (1970)
5. Frost, P., Scott, E. J., van: Ichthyosiform dermatoses. Arch. Dermatol. 94, 113?126 (1966)