Bettina Bazijanec Key Pousttchi Klaus Turowski An Approach for Assessment of Electronic Offers. 44-57 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3236&spage=44 2004 conf/forte/2004w FORTE Workshops db/conf/forte/fortew2004.html#BazijanecPT04