AHMAD, I.; WAHID, Z.; ANSARI, M. Melasma: a comparative trial of azelaic acid (20%) cream alone and in combination with tretinoin (0.1%) cream. Journal of Pakistan Association of Dermatologists, [S. l.], v. 14, n. 1, p. 10–15, 2017. Disponível em: https://www.jpad.com.pk/index.php/jpad/article/view/770. Acesso em: 26 feb. 2026.