Gang Xie Wuyi Yue Shouyang Wang Using VPRS-Based Group Decision-Making to Evaluate Partner Relationship in the Value Network of a Mobile Portal. 156-160 2009 BIFE http://doi.ieeecomputersociety.org/10.1109/BIFE.2009.45 conf/bife/2009 db/conf/bife/bife2009.html#XieYW09