Ling, Gao, Caroline A. Chadwick, Berit Berne, Christopher S. Potten, Jan Pontén, and Fredrik Pontén. 2001. “Epidermal p53 Response and Repair of Thymine Dimers in Human Skin After a Single Dose of Ultraviolet Radiation: Effects of Photoprotection”. Acta Dermato-Venereologica 81 (2):81-86. https://doi.org/10.1080/00015550152384173.