Cornaghi, Brigida, et al. “Effects of UV Rays and Natural Compound Repairs Using an Ex-Vivo Human Skin Model: Morphological and Genotoxicological Analysis”. Italian Journal of Anatomy and Embryology, vol. 120, no. 1, Sept. 2015, p. 99, https://oajournals.fupress.net/index.php/ijae/article/view/4053.