“Oral Mucosa Hyperpigmentation As a Presentation of Laugier-Hunziker Syndrome: A Case Report”. Portuguese Journal of Family Medicine and General Practice 38, no. 2 (April 29, 2022): 198–202. Accessed April 17, 2026. https://rpmgf.pt/ojs/index.php/rpmgf/article/view/13189.