Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MUSHIMOTO Kozo and IMAUE Shigeki and HARA Katsuhiro and TAKASU Jun,Pigmented nevus of the gingiva: Report of a case,Japanese Journal of Oral and Maxillofacial Surgery,00215163,Japanese Society of Oral and Maxillofacial Surgeons,1977,23,5,692-694,https://cir.nii.ac.jp/crid/1390282681508133760,https://doi.org/10.5794/jjoms.23.692