Hartl, Christoph, Kay H. Steen, Holger Wegner, Heinz-Werner Seifert, and Thomas Bieber. 1999. “Unilateral Linear Lichen Planus With Mucous Membrane Involvement”. Acta Dermato-Venereologica 79 (2):145-46. https://doi.org/10.1080/000155599750011390.