4[1]Razzaque M A, Sheng C C. Outsourcing of Logistics Functions: Literature Survey[J]. International Journal of Physical Distribution & Logistics Management, 1998,(2):89-107.
5[3]Cheng-Ju Chien, Hui-Hua Tsai. Using Fuzzy Numbers to Evaluate Perceived Service Quality[J]. Fuzzy Sets and Systems, 2000, (116): 289-300.
6[6]Da-Yong Chang. Applications of the Extent Analysis Method on Fuzzy AHP[J]. European Journal of Operational Research, 1996, (95): 649-655.