By Kajitani Yoshio   Sagai Shigeo   in International Journal of Critical Infrastructures

ISSN:1475-3219|5|1-2|38-50

Inderscience Publishers‎(2009)‎

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By Yamano Norihiko   Kajitani Yoshio   Shumuta Yoshiharu   in Economic Systems Research

ISSN:1469-5758|19|2|163-181

Routledge Ltd‎(2007)‎

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