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
"Hardy, Daniel C. and Houten, Jan van","Soft budget constraints, firm commitments and the social safety net",,International Monetary Fund,1991,IMF working paper,,,,https://cir.nii.ac.jp/crid/1130000795816565760