1. Ultraviolet light and skin cancer;Findlay;Lancet,1928
2. The ultraviolet radiation of sunlight is a major factor in human cutaneous cancer;Blum;J. Nat. Cancer Inst.,1940
3. The physiological effects of sun-light on man;Blum;Physiol. Rev.,1945
4. Light and the melanin pigment of human skin;Blum,1948
5. “The Histopathology of the Diseases of the Skin” translated by N. Walker;Unna,1896