1. D. G. Bailey(1963 ) The Infected Hand . London, Lewis, p.162 .
2. Acquired digital fibrokeratomas
3. RUDIMENTARY POLYDACTYLY.*
4. P. J. Hare, and J. L. Provan(1967 ) Dermatofibrosarcoma Protuberans . British Association of Dermatology, Clinical Meeting, London, 1967. Case 16.