1. Habif TP: Clinical Dermatology (ed 3). St Louis, MO, Mosby, 1996, pp 643
2. Marks VJ, Papa CA: Chondrodermatitis nodularis helicis. Available at: www.emedicine.com/derm/topic76.htm. Accessed August 21, 2006
3. Chondrodermatitis nodularis helicis;Zuber;Arch Fam Med,1999
4. Andrew’s Diseases of the Skin;Domonkos,1982
5. Chondrodermatitis nodularis chronica helicis: A review with emphasis on steroid therapy;Wade;Cutis,1979