TRUNG, T. H.; LÂM, L. N.; THUỴ, P. A. V. Histological survey of gingival hyperpigmentation. Journal of Medical Research, [S. l.], v. 199, n. 2, p. 660-666, 2026. DOI: 10.52852/tcncyh.v199i2.4712. Disponível em: https://tapchinghiencuuyhoc.vn/index.php/tcncyh/article/view/4712. Acesso em: 11 nov. 2026.