Ranjan, S., R. Gupta, and S. Gupta. “A Study of the Efficacy of Skin Needling and Platelet Rich Plasma in the Treatment of Acne Scars”. Nepal Journal of Dermatology, Venereology &Amp; Leprology, vol. 15, no. 1, Aug. 2017, pp. 17-23, doi:10.3126/njdvl.v15i1.18047.