Abdullah, Galawish A. “The Efficacy and Tolerability of 10mg and 20mg Day Isotretinoinin the Treatment of Acne Vulgaris in Iraqi Patients”. AL-Kindy College Medical Journal, vol. 9, no. 1, Jan. 2013, pp. 94-99, https://jkmc.uobaghdad.edu.iq/index.php/MEDICAL/article/view/560.