Bjerke, J., Krogh, H. and 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), pp. 371–380. doi: 10.2340/0001555561371380.