1. OBSERVATIONS ON ULTRAVIOLET ERYTHEMA
2. THEORY OF ULTRAVIOLET ERYTHEMA
3. J.C. Leun(1966 )Ultraviolet Erythema; A Study on Diffusion Processes in Human Skin. Thesis , Utrecht.
4. ThLewis(1917 ) The Blood Vessels of the Human Skin and their Responses , pp.117 -138 . Shaw, London.