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 "Hagen, Ole",Separation of cardinal utility and specific utility of risk in theory of choices under uncertainty,,Statsøkonomisk Tidsskrift,1969,Norges Handelshøyskoles Særtrykk-Serie,,,,https://cir.nii.ac.jp/crid/1130282269961311488