Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
VINCENT G.,Gingival contour and clinical crown length : Their effect on the esthetic appearance of maxillary anterior teeth,Am. J. Orthod.,,,1984,86,2,89-94,https://cir.nii.ac.jp/crid/1573105976175325824,