1. The variations and course of lichen planus;Altman;Arch. Dermatol.,1961
2. Oral lichen planus. A clinical evaluation of 115 cases;Andreasen;Oral Surg.,1968
3. Cancer-udvikling i oral lichen planus: En litteraturo-versigt;Andreasen;Nord. Med.,1963
4. Dermatology in general medicine;Arndt,1971
5. Immune parameters in the host response to neoplasia: morphological considerations;Berman,1975