Mazzarello, Vittorio, Giorgio Piga, Marco Ferrari, Eleonora Curreli, Serena Dettori, Federica Longoni, Paola Delaconi, Maria Sotgiu, and Pasquale Bandiera. 2013. “Hydration, PH, Pigmentation, Sebum and Skin Texture: An in Vivo Non Invasive Study in Centenaries”. Italian Journal of Anatomy and Embryology 117 (2):122. https://oajournals.fupress.net/index.php/ijae/article/view/4308.