Bjerke, J., Krogh, H., & Matre, R. (1981). In situ identification of mononuclear cells in cutaneous infiltrates in discoid lupus erythematosus, sarcoidosis and secondary syphilis. Acta Dermato-Venereologica, 61(5), 371–380. https://doi.org/10.2340/0001555561371380