1. IMarjolin JN. Ulcere. Dict de med (practique). 2nd ed. Paris, 1846:24.
2. Epithelioma and the chronic varicose ulcer;Knox, L.C.;JAMA
3. Neoplastic disease occurring in varicose ulcers or eczema: a report of six cases. Br3';Black, W.;Cancer,1952
4. Basal cell carcinomatous changes of the lower leg: an association with chronic venous stasis;Walkden, V.; Black, M.M.;Br
5. Accepted,1982