Zubair, S., & Mujtaba, G. (2016). Comparison of efficacy of topical 2% liquiritin, topical 4% liquiritin and topical 4% hydroquinone in the management of melasma. Journal of Pakistan Association of Dermatologists, 19(3), 158–163. https://doi.org/10.66344/jpad.19.3.2009.533