By Zellner Christian   Fornahl Dirk   in Journal of Knowledge Management

ISSN:1367-3270|6|2|190-198

Emerald Group Publishing Ltd‎(2002)‎

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By Witt Ulrich   Zellner Christian   in Economics of Innovation and New Technology

ISSN:1043-8599|18|7|647-661

Routledge Ltd‎(2009)‎

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By Vang Jan   Zellner Christian   in Industry and Innovation

ISSN:1469-8390|12|2|147-152

Routledge Ltd‎(2005)‎

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