Oral mucosa hyperpigmentation as a presentation of Laugier-Hunziker syndrome: a case report. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 38, n. 2, p. 198–202, 2022. DOI: 10.32385/rpmgf.v38i2.13189. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/13189. Acesso em: 17 apr. 2026.