Pigmented lesions of the oral mucosa: clinical presentation, diagnosis and treatment. Research, Society and Development, [S. l.], v. 10, n. 16, p. e03101622446, 2021. DOI: 10.33448/rsd-v10i16.22446. Disponível em: https://rsdjournal.org/rsd/article/view/22446. Acesso em: 5 dec. 2025.