8Kamcshwaran S, Narahari Y, Rosa C H, et al.. M ultiattribute electronic procurement using goal programming[ J]. European Journal of Operational Research, 2007, 179 ( 2 ) : 518-536.
9Wu F, Zsidisin G A, Ross A D. Antecedents and outcomes of e-procurement adoption: an integrative model[ J]. IEEE Transactions on Engineering Management, 2007, 54 (3) : 576-587.
10Ryall M D, Sorenson O. Brokers and competitive advantage[ J]. Management Science, 2007, 53 (4) : 566-583.