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
"Nenovski, Nikolaĭ and Ivanov, Martin and Mihaylova, Gergana and Trapeza tēs Hellados and South-Eastern European Monetary History Network (SEEMHN)",The evolution of Bulgarian banks' efficiency during the twenties : a DEA approach,,Bank of Greece,2008,Working paper,,,,https://cir.nii.ac.jp/crid/1130578735934200598