Pica Alfieri, Edoardo, Andrea Sisti, Giuseppe Nisi, Cesare Brandi, Luca Grimaldi, and Carlo D’Aniello. “A Giant Keratoacanthoma of the Cheek”. Acta Bio Medica Atenei Parmensis 90, no. 4 (December 23, 2019): 580-582. Accessed August 6, 2020. https://mattioli1885journals.com/index.php/actabiomedica/article/view/7409.