1. Cancerudi-vikling i oral lichen planus;Andreasen;Nord Med,1963
2. Stillman, M.A.; Bart, R.S.; and Kopf, A.W. Squamous cell carcinoma occurring in oral lichen planus. Cutis 11(4):486-490.
3. Oral lichen planus: the evidence regarding potential malignant transformation;Krutchkoff;J Oral Pathol,1978
4. Transformation of oral lichen planus to squamous cell carcinoma: a literature review and report of case;Marder;JADA,1982
5. An update on the dysplastic/carcinomatous transformation of oral lichen planus;Kaugars;J Oral Med,1982