著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Koopmans, Tjalling Charles",Note on a social system composed of hierarchies with overlapping personnel,,Cowles Foundation for Research in Economics at Yale University,1969,Cowles Foundation paper,,,,https://cir.nii.ac.jp/crid/1130000794279422208