Zubair, S., S. Hafeez, and G. Mujtaba. “Efficacy of Intravenous Glutathione Vs. Placebo for Skin Tone Lightening”. Journal of Pakistan Association of Dermatologists, vol. 26, no. 3, Mar. 2017, pp. 177-81, http://www.jpad.com.pk/index.php/jpad/article/view/18.