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ISSN:1474-6778|3|2|145-167

Inderscience Publishers‎(2004)‎

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By Isenmann Ralf   in uwf UmweltWirtschaftsForum

ISSN:0943-3481|15|2|75-81

Springer Publishing Company ‎(2007)‎

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By Bey Christoph   Isenmann Ralf   in International Journal of Sustainable Development

ISSN:0960-1406|8|3|189-206

Inderscience Publishers‎(2006)‎

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