By Methlie Leif B.   Nysveen Herbjorn   in Journal of Information Technology

ISSN:1466-4437|14|4|375-386

Palgrave Macmillan Ltd‎(1999)‎

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By Nysveen Herbjorn   Pedersen Per E.   in International Journal of Internet Marketing and Advertising

ISSN:1477-5212|2|4|288-306

Inderscience Publishers‎(2005)‎

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