1. Letter: Epidermal inclusion cysts
2. A. N. Domonkos (1971 ) Andrews' Diseases of the Skin , 6th edn. , pp541 -543 . Philadelphia: W. B. Saunders Co.
3. Biography of a Dermatological Society
4. W. F. Lever, and G. Schaumburg-Lever (1975 ) Histopathology of the Skin , 5th edn. , pp346 -348 . Philadelphia-Toronto: J. B. Lippincott Co.