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) TONG H.,Center-piece subgraphs : Problem definition and fast solutions,"Proc. 12th ACM SIGKDD Conference, 2006",,,2006,,,404-413,https://cir.nii.ac.jp/crid/1570009751246877440,