Kumar, K. M., A. K. Pandey, A. Mohan, and S. K. Ojha. “Role of Different Topical Modalities in Improvement of Facial Hyperpigmentation and Skin Rejuvenation”. International Journal of Research in Dermatology, vol. 5, no. 4, Oct. 2019, pp. 861-9, doi:10.18203/issn.2455-4529.IntJResDermatol20194683.