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 "Lombardi, Michele and 吉原, 直毅",Alternative characterizations of the proportional solution for nonconvex bargaining problems with claims,,"Institute of Economic Research, Hitotsubashi University",2008,Discussion paper series,,,,https://cir.nii.ac.jp/crid/1130282269914303360