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) "Katsumata, Sotaro",A comparison of two lead user measures and an exploration of their nature,経営と経済,02869101,長崎大学経済学会,2011-09-26,91,1-2,1-16,https://cir.nii.ac.jp/crid/1050287297251757696,