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
"Unger, Albina and Poddig, Thorsten",The use of risk budgets in portfolio optimization,,Springer Gabler,2015,Research,,9783658072582,,https://cir.nii.ac.jp/crid/1130282269457053696