1. Lichen planus;Arndt,1993
2. Anote on the natural history of lichen planus;Br. J. Dermatol.,1956
3. Lichen planusandlichenoid eruptions;Black,1986
4. Lichen planus;Boyd;J. Am. Acad. Dermatol.,1991
5. Frequency, duration and localization of lichen planus: a study based on 181 patients;Schmidt;Acta Derm. Venereol.,1961