1. American Academy of Dermatology Invitation Symposium on Comedogenecity (1989) (Special report). J Am Acad Dermatol 20:272–277
2. Baran R, Chivot M, Shalita AR (1998) Acne. In: Baran R, Maibach HI (eds) Textbook of Cosmetic Dermatology (2nd edn). Martin Dunitz, London, pp 433–444
3. Barankin B, DeKoven J (2002) Psychosocial effect of common skin diseases. Can Fam Physician 48: 712–716
4. Baumann L (2002) Cosmetic Dermatology - Principles and Practice. Mc Graw Hill, New York
5. Braun-Falco O, Plewig G, Wolff HH (Hrsg) (1996) Dermatologie and Venerologie, 4. Aufl. Springer Verlag Berlin, S 436–442