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) NAKATANI T.,Evolutional Characteristics of Class Inheritance Trees,Proc.of the International Symposium on Future Software Technology '97,,SEA,1997,,,44-51,https://cir.nii.ac.jp/crid/1570854174069411328,