1. Psoriasis of the scalp: diagnosis and management;Van de Kerkhof;Am J Clin Dermatol,2001
2. Facial psoriasis;Harrison;Clin Exp Dermatol,1985
3. Facial involvement is a sign of severe psoriasis;Bernhard,1987
4. Facial involvement as a marker of severe psoriasis;Fullerton;Cutis,1987
5. Psoriasis: prevalence, spontaneous course and genetics;Lomholt,1963