1. Barka, T., Anderson, P. J.: Histochemistry, theory, practice and bibliography. New York: Harper and Row, Inc. 1963.
2. Handbuch der Haut- und Geschlechtskrankheiten, Erg�nzungswerk;I. Brody,1968
3. Cruickshank, C. N. D., Cooper, J. R., Hopper, C.: The cultivation of cells from adult epidermis. J. invest. Derm.34, 339?342 (1960).
4. Fishman, W. H.: Rat sceletal muscle?-glucuronidase localization by postcoupling technique using Naphthol AS-BI-?-D-glucosiduronic acid and fast dark blue. J. Histochem. Cytochem.12, 306?308 (1964).
5. Fortelius, P.: Enzyme activity in cultured cells under various influences. A cytochemical approach. Acta path. microbiol. scand., Suppl.164, 1?94 (1963).