Ahmad, Ijaz, Zarnaz Wahid, and Mujeeb Ansari. 2017. “Melasma: A Comparative Trial of Azelaic Acid (20%) Cream Alone and in Combination With Tretinoin (0.1%) Cream”. Journal of Pakistan Association of Dermatologists 14 (1):10-15. https://doi.org/10.66344/jpad.14.1.2004.770.