3KHENG C B, AI-Hawamdeh S. The adoption of electronic procurement in singapore[J]. Electronic Commerce Resecarch, 2002,2 (1-2) : 61-73.
4RATNASINGAM P. Perceived risks in supply chain management e-collaboration[J]. Journal of Internet Commerce, 2006, 5( 4 ): 105-124.
5SUBBARAO T D, SENECAL S, LE T T. How buyers' expected benefits, perceived risks and e-business readiness influence their e-marketplace usage[J]. Industrial Marketing Management, 2007, 36: 1035- 1045.