著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) NISHIHARA K,"Comparative studies on periodontal tissue around new type artificial roots made of zirconium oxide, titanium and hydroxylapatite",Phosphorous Res Bulletin,,,1991,1,1,178-184,https://cir.nii.ac.jp/crid/1573950399011106688,