Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) PENNEYS NS,Pathogenesis of Woronoff ring in psoriasis,Arch Dermatol,,,1976,112,,955-957,https://cir.nii.ac.jp/crid/1574231875912946048,https://doi.org/10.1001/archderm.112.7.955