Siddique, M., Khondker, L., Hazra, S., & Khan, M. (2016). The efficacy of combination of 20% azelaic acid with 0.05% tretinoin cream in the treatment of melasma. Journal of Pakistan Association of Dermatologists, 21(4), 265–269. Retrieved from https://www.jpad.com.pk/index.php/jpad/article/view/487