3Lehmann D R, O' Shaughnessy J. Decision Criteria Used in Buying Different Categories of Products [ J ]. Journal of Purchasing and Materials Management, 1982, spring: 9 - 14.
4C. A. Weber,J. R. Current W. C. Benton. Vendor selection criteria and methods[ J]. European Journal of Operational Researeh, 1991,50:2 - 18.