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) ,A solution-space reduction method for traveling salesman problem using geographical threshold graph with neighbor information,IEICE Technical Report VOL.109,,,2009,,,57-62,https://cir.nii.ac.jp/crid/1010282257008462483,