1. D. Cotton(1973 ) Price's Textbook of the Practice of Medicine , 11th edition , p.1241 . Oxford University Press, London.
2. W.F. Lever(1967 ) Histopathology of the Skin , 4th edition , p.620 . Pitman Medical Publishing Co. Ltd., London.
3. DERMABRASION AND LIMITED EXCISION OF THE FIBROUS PAPULES OF TUBEROUS SCLEROSIS
4. R.J. Reis(1968 ) Cecil-Loeb Textbook of Medicine , 13th edition , pp.310 -311 . W. B. Saunders Co., Philadelphia.