1. Psychosocial impact of postinflammatory hyperpigmentation in patients with acne vulgaris;Darji;J Clin Aesthet Dermatol,2017
2. The validity and practicality of sun-reactive skin types I through VI;Fitzpatrick;Arch Dermatol,1988
3. Postinflammatory hyperpigmentation: Evolving combination treatment strategies;Taylor;Cutis.,2006
4. The Roberts skin type classification system;Roberts;J Drugs Dermatol,2008
5. Skin type classification systems old and new;Roberts;Dermatol Clin,2009