1. Adams-Ray, J., G. Bloom, and E. M. Ritzén: Cells with autofluorescent granules in dermis of human skin and their correlation to degree of pigmentation. Acta morph. neerl.-scand. 3, 131?134 (1960).
2. ?, et H. Nordenstam: Un système de cellules chromaffines dans la peau humaine. Lyon chir. 52, 125?129 (1956).
3. Barka, T., and P. J. Anderson: Histochemistry; theory, practice and bibliography. New York: Harper & Row, Inc. 1963.
4. Becker, S. W.: Melanin pigmentation; systematic study of pigment of human skin and the upper mucous membranes with special consideration of pigment dendritic cells. Arch. Derm. 16, 259?290 (1927).
5. Becker, S. W.: Dermatological investigations of melanin pigmentation. In: The biology of melanomas (R. W. Miner, Ed.). N. Y. Aoad. Sci. Spec. Publ. 4, 82?125 (1948).