Chowdhury, W., M. Wahab, L. Khondker, M. Khan, and I. Shirajul. “Efficacy and Safety of Hydroquinone, Kojic Acid and Glycolic Acid Combination in the Treatment of Melasma”. Bangladesh Journal of Medical Science, vol. 11, no. 3, Aug. 2012, pp. 191-6, doi:10.3329/bjms.v11i3.11720.