1. Cecil Essentials of Medicine;Andreoli,1986
2. Diseases of the Hair and Nails;Baden,1987
3. Skin Signs of Systemic Disease;Braverman,1981
4. Multiple Beau’s lines due to dysmenorrhea?;Colver;Br J Dermatol,1984
5. Nails in systemic disease;Daniel;Dermatol Clin,1985