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[文献書誌] Koyama, Yoji: "Banking System Reform in FR Yugoslavia as a Part of Stabilization of South Eastern Europe"Proceedings of the 5^<th> International Conference "Enterprise in Transition", held by Faculty of Economics, University of Split. 296-298 (2003)
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[文献書誌] Koyama, Yoji: "The Transition to a Market Economy in the Successor States Former Yugoslavia : Differences of North and South"Working Papers (published by Institute for World Economics, Hungarian Academy of Sciences). No.135. 1-42 (2003)
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[文献書誌] Koyama, Yoji: "Trasition in Croatia"Ekonomski Pregled (Journal published by Croatian Economic Society). Vol.54, No.11-12. 979-998 (2003)
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[文献書誌] Koyama, Yoji: "South Eastern Europe in Transition : A Quest for Stabilization of the Region after the Breakup of the Former Yugoslavia"Graduate School of Modern Society and Culture, Niigata University(新潟大学大学院現代社会文化研究科). 224 (2003)