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) O.K Mont,Clarifying the concept of product–service system,Journal of Cleaner Production,0959-6526,Elsevier BV,2002-06,10,3,237-245,https://cir.nii.ac.jp/crid/1363670320663090304,https://doi.org/10.1016/s0959-6526(01)00039-7